83156161 has 9 divisors (see below), whose sum is σ = 91513443. Its totient is φ = 75505320.

The previous prime is 83156119. The next prime is 83156191. The reversal of 83156161 is 16165138.

The square root of 83156161 is 9119.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 47872561 + 35283600 = 6919^2 + 5940^2 .

It is not a de Polignac number, because 83156161 - 2⁷ = 83156033 is a prime.

It is a super-2 number, since 2×83156161² = 13829894224515842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83156191) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 99895 + ... + 100723.

Almost surely, 2^83156161 is an apocalyptic number.

83156161 is the 9119-th square number.

83156161 is the 4560-th centered octagonal number.

It is an amenable number.

83156161 is a deficient number, since it is larger than the sum of its proper divisors (8357282).

83156161 is an frugal number, since it uses more digits than its factorization.

83156161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 840 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The cubic root of 83156161 is about 436.4804641563.

The spelling of 83156161 in words is "eighty-three million, one hundred fifty-six thousand, one hundred sixty-one".