23438531 has 2 divisors, whose sum is σ = 23438532. Its totient is φ = 23438530.

The previous prime is 23438521. The next prime is 23438537. The reversal of 23438531 is 13583432.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23438531 is a prime.

It is a super-2 number, since 2×23438531² = 1098729470875922, 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 = 23438494 and 23438503.

It is not a weakly prime, because it can be changed into another prime (23438537) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11719265 + 11719266.

It is an arithmetic number, because the mean of its divisors is an integer number (11719266).

Almost surely, 2^23438531 is an apocalyptic number.

23438531 is a deficient number, since it is larger than the sum of its proper divisors (1).

23438531 is an equidigital number, since it uses as much as digits as its factorization.

23438531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 23438531 is about 4841.3356628104. The cubic root of 23438531 is about 286.1827568448.

The spelling of 23438531 in words is "twenty-three million, four hundred thirty-eight thousand, five hundred thirty-one".