| Base | Representation |
|---|---|
| bin | 10011001101111… |
| … | …11011000000000 |
| 3 | 102020100121202222 |
| 4 | 21212333120000 |
| 5 | 312232403000 |
| 6 | 23555230212 |
| 7 | 3665212331 |
| oct | 1146773000 |
| 9 | 366317688 |
| 10 | 161216000 |
| 11 | 83002a70 |
| 12 | 45ba8368 |
| 13 | 275280aa |
| 14 | 175a8288 |
| 15 | e247a85 |
| hex | 99bf600 |
161216000 has 160 divisors (see below), whose sum is σ = 440462880. Its totient is φ = 58368000.
The previous prime is 161215997. The next prime is 161216009. The reversal of 161216000 is 612161.
It is a happy number.
It is a tau number, because it is divible by the number of its divisors (160).
It is a self number, because there is not a number n which added to its sum of digits gives 161216000.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (161216009) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 703886 + ... + 704114.
It is an arithmetic number, because the mean of its divisors is an integer number (2752893).
Almost surely, 2161216000 is an apocalyptic number.
161216000 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 161216000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220231440).
161216000 is an abundant number, since it is smaller than the sum of its proper divisors (279246880).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161216000 is an equidigital number, since it uses as much as digits as its factorization.
161216000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 273 (or 247 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 17.
The square root of 161216000 is about 12697.0862799305. The cubic root of 161216000 is about 544.2553587755.
Adding to 161216000 its reverse (612161), we get a palindrome (161828161).
The spelling of 161216000 in words is "one hundred sixty-one million, two hundred sixteen thousand".
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