23891700002531 has 2 divisors, whose sum is σ = 23891700002532. Its totient is φ = 23891700002530.

The previous prime is 23891700002491. The next prime is 23891700002551. The reversal of 23891700002531 is 13520000719832.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23891700002531 is a prime.

It is a super-2 number, since 2×23891700002531² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (23891700002551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11945850001265 + 11945850001266.

It is an arithmetic number, because the mean of its divisors is an integer number (11945850001266).

Almost surely, 2^{23891700002531} is an apocalyptic number.

23891700002531 is a deficient number, since it is larger than the sum of its proper divisors (1).

23891700002531 is an equidigital number, since it uses as much as digits as its factorization.

23891700002531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 23891700002531 in words is "twenty-three trillion, eight hundred ninety-one billion, seven hundred million, two thousand, five hundred thirty-one".