23291831 has 2 divisors, whose sum is σ = 23291832. Its totient is φ = 23291830.

The previous prime is 23291797. The next prime is 23291839. The reversal of 23291831 is 13819232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23291831 - 2¹⁸ = 23029687 is a prime.

It is a super-2 number, since 2×23291831² = 1085018782665122, 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 = 23291794 and 23291803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23291839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11645915 + 11645916.

It is an arithmetic number, because the mean of its divisors is an integer number (11645916).

Almost surely, 2^23291831 is an apocalyptic number.

23291831 is a deficient number, since it is larger than the sum of its proper divisors (1).

23291831 is an equidigital number, since it uses as much as digits as its factorization.

23291831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 23291831 is about 4826.1611038174. The cubic root of 23291831 is about 285.5844413934.

The spelling of 23291831 in words is "twenty-three million, two hundred ninety-one thousand, eight hundred thirty-one".