23158161 has 12 divisors (see below), whose sum is σ = 36023988. Its totient is φ = 14251104.

The previous prime is 23158159. The next prime is 23158183. The reversal of 23158161 is 16185132.

23158161 is a `hidden beast` number, since 23 + 1 + 581 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1115136 + 22043025 = 1056^2 + 4695^2 .

It is not a de Polignac number, because 23158161 - 2¹ = 23158159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23158361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98850 + ... + 99083.

It is an arithmetic number, because the mean of its divisors is an integer number (3001999).

Almost surely, 2^23158161 is an apocalyptic number.

It is an amenable number.

23158161 is a deficient number, since it is larger than the sum of its proper divisors (12865827).

23158161 is a wasteful number, since it uses less digits than its factorization.

23158161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197952 (or 197949 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 23158161 is about 4812.2926968338. The cubic root of 23158161 is about 285.0370773553.

The spelling of 23158161 in words is "twenty-three million, one hundred fifty-eight thousand, one hundred sixty-one".