23154297931 has 2 divisors, whose sum is σ = 23154297932. Its totient is φ = 23154297930.

The previous prime is 23154297923. The next prime is 23154297973. The reversal of 23154297931 is 13979245132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23154297931 - 2³ = 23154297923 is a prime.

It is a super-2 number, since 2×23154297931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23154291931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11577148965 + 11577148966.

It is an arithmetic number, because the mean of its divisors is an integer number (11577148966).

Almost surely, 2^23154297931 is an apocalyptic number.

23154297931 is a deficient number, since it is larger than the sum of its proper divisors (1).

23154297931 is an equidigital number, since it uses as much as digits as its factorization.

23154297931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The spelling of 23154297931 in words is "twenty-three billion, one hundred fifty-four million, two hundred ninety-seven thousand, nine hundred thirty-one".