23656531 has 2 divisors, whose sum is σ = 23656532. Its totient is φ = 23656530.

The previous prime is 23656517. The next prime is 23656541. The reversal of 23656531 is 13565632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23656531 - 2⁹ = 23656019 is a prime.

It is a super-2 number, since 2×23656531² = 1119262917907922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23656493 and 23656502.

It is not a weakly prime, because it can be changed into another prime (23656511) 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 as a sum of consecutive naturals, namely, 11828265 + 11828266.

It is an arithmetic number, because the mean of its divisors is an integer number (11828266).

Almost surely, 2^23656531 is an apocalyptic number.

23656531 is a deficient number, since it is larger than the sum of its proper divisors (1).

23656531 is an equidigital number, since it uses as much as digits as its factorization.

23656531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 23656531 is about 4863.7980015622. The cubic root of 23656531 is about 287.0672749169.

The spelling of 23656531 in words is "twenty-three million, six hundred fifty-six thousand, five hundred thirty-one".