23143931 has 2 divisors, whose sum is σ = 23143932. Its totient is φ = 23143930.

The previous prime is 23143903. The next prime is 23143937. The reversal of 23143931 is 13934132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23143931 - 2⁶ = 23143867 is a prime.

It is a super-2 number, since 2×23143931² = 1071283084265522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23143931.

It is not a weakly prime, because it can be changed into another prime (23143937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11571965 + 11571966.

It is an arithmetic number, because the mean of its divisors is an integer number (11571966).

Almost surely, 2^23143931 is an apocalyptic number.

23143931 is a deficient number, since it is larger than the sum of its proper divisors (1).

23143931 is an equidigital number, since it uses as much as digits as its factorization.

23143931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 23143931 is about 4810.8139643931. The cubic root of 23143931 is about 284.9786831291.

The spelling of 23143931 in words is "twenty-three million, one hundred forty-three thousand, nine hundred thirty-one".