23155161 has 16 divisors (see below), whose sum is σ = 31874304. Its totient is φ = 14943744.

The previous prime is 23155157. The next prime is 23155163. The reversal of 23155161 is 16155132.

It is not a de Polignac number, because 23155161 - 2² = 23155157 is a prime.

It is a super-2 number, since 2×23155161² = 1072322961871842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23155163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12831 + ... + 14523.

It is an arithmetic number, because the mean of its divisors is an integer number (1992144).

Almost surely, 2^23155161 is an apocalyptic number.

It is an amenable number.

23155161 is a deficient number, since it is larger than the sum of its proper divisors (8719143).

23155161 is a wasteful number, since it uses less digits than its factorization.

23155161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840.

The product of its digits is 900, while the sum is 24.

The square root of 23155161 is about 4811.9809849998. The cubic root of 23155161 is about 285.0247685460.

The spelling of 23155161 in words is "twenty-three million, one hundred fifty-five thousand, one hundred sixty-one".