| Base | Representation |
|---|---|
| bin | 100100001101101… |
| … | …1110111100000000 |
| 3 | 10010200112201212000 |
| 4 | 1020123132330000 |
| 5 | 4442040223120 |
| 6 | 320325104000 |
| 7 | 42053503440 |
| oct | 11033367400 |
| 9 | 3120481760 |
| 10 | 1215164160 |
| 11 | 573a23901 |
| 12 | 29ab58000 |
| 13 | 1649a3762 |
| 14 | b755a120 |
| 15 | 71a33990 |
| hex | 486def00 |
1215164160 has 288 divisors, whose sum is σ = 4929146880. Its totient is φ = 277696512.
The previous prime is 1215164149. The next prime is 1215164161. The reversal of 1215164160 is 614615121.
1215164160 is a `hidden beast` number, since 1 + 2 + 15 + 1 + 641 + 6 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (288).
It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1215164161) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239409 + ... + 244431.
Almost surely, 21215164160 is an apocalyptic number.
1215164160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1215164160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2464573440).
1215164160 is an abundant number, since it is smaller than the sum of its proper divisors (3713982720).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1215164160 is an equidigital number, since it uses as much as digits as its factorization.
1215164160 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5060 (or 5040 counting only the distinct ones).
The product of its (nonzero) digits is 1440, while the sum is 27.
The square root of 1215164160 is about 34859.2048102076. The cubic root of 1215164160 is about 1067.1160467635.
Adding to 1215164160 its reverse (614615121), we get a palindrome (1829779281).
The spelling of 1215164160 in words is "one billion, two hundred fifteen million, one hundred sixty-four thousand, one hundred sixty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.072 sec. • engine limits •