23156427 has 16 divisors (see below), whose sum is σ = 35544320. Its totient is φ = 13135392.

The previous prime is 23156417. The next prime is 23156449. The reversal of 23156427 is 72465132.

It is a de Polignac number, because none of the positive numbers 2^k-23156427 is a prime.

It is a super-2 number, since 2×23156427² = 1072440222812658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23156394 and 23156403.

It is not an unprimeable number, because it can be changed into a prime (23156417) 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, 1048 + ... + 6885.

It is an arithmetic number, because the mean of its divisors is an integer number (2221520).

Almost surely, 2^23156427 is an apocalyptic number.

23156427 is a deficient number, since it is larger than the sum of its proper divisors (12387893).

23156427 is a wasteful number, since it uses less digits than its factorization.

23156427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082.

The product of its digits is 10080, while the sum is 30.

The square root of 23156427 is about 4812.1125298563. The cubic root of 23156427 is about 285.0299629932.

The spelling of 23156427 in words is "twenty-three million, one hundred fifty-six thousand, four hundred twenty-seven".