23156613 has 12 divisors (see below), whose sum is σ = 33537868. Its totient is φ = 15396480.

The previous prime is 23156603. The next prime is 23156621. The reversal of 23156613 is 31665132.

It can be written as a sum of positive squares in 2 ways, for example, as 19342404 + 3814209 = 4398^2 + 1953^2 .

It is not a de Polignac number, because 23156613 - 2²¹ = 21059461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23156603) 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, 333 + ... + 6813.

Almost surely, 2^23156613 is an apocalyptic number.

It is an amenable number.

23156613 is a deficient number, since it is larger than the sum of its proper divisors (10381255).

23156613 is a wasteful number, since it uses less digits than its factorization.

23156613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6884 (or 6881 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 23156613 is about 4812.1318560488. The cubic root of 23156613 is about 285.0307261425.

The spelling of 23156613 in words is "twenty-three million, one hundred fifty-six thousand, six hundred thirteen".