| Base | Representation |
|---|---|
| bin | 10011010000001… |
| … | …11110111011000 |
| 3 | 102020220201002000 |
| 4 | 21220013313120 |
| 5 | 312321403140 |
| 6 | 24005441000 |
| 7 | 4000560102 |
| oct | 1150076730 |
| 9 | 366821060 |
| 10 | 161512920 |
| 11 | 83196058 |
| 12 | 46110160 |
| 13 | 2760029a |
| 14 | 17644572 |
| 15 | e2a5a30 |
| hex | 9a07dd8 |
161512920 has 256 divisors, whose sum is σ = 601344000. Its totient is φ = 38320128.
The previous prime is 161512909. The next prime is 161512921. The reversal of 161512920 is 29215161.
161512920 is a `hidden beast` number, since 1 + 61 + 512 + 92 + 0 = 666.
161512920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
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 (161512921) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 348609 + ... + 349071.
It is an arithmetic number, because the mean of its divisors is an integer number (2349000).
Almost surely, 2161512920 is an apocalyptic number.
161512920 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 161512920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300672000).
161512920 is an abundant number, since it is smaller than the sum of its proper divisors (439831080).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161512920 is a wasteful number, since it uses less digits than its factorization.
161512920 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 519 (or 509 counting only the distinct ones).
The product of its (nonzero) digits is 1080, while the sum is 27.
The square root of 161512920 is about 12708.7733475737. The cubic root of 161512920 is about 544.5892817799.
It can be divided in two parts, 1615 and 12920, that added together give a triangular number (14535 = T170).
The spelling of 161512920 in words is "one hundred sixty-one million, five hundred twelve thousand, nine hundred twenty".
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