23121586531 has 2 divisors, whose sum is σ = 23121586532. Its totient is φ = 23121586530.

The previous prime is 23121586529. The next prime is 23121586547. The reversal of 23121586531 is 13568512132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23121586531 - 2¹ = 23121586529 is a prime.

It is a super-2 number, since 2×23121586531² (a number of 22 digits) contains 22 as substring.

Together with 23121586529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23121586231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560793265 + 11560793266.

It is an arithmetic number, because the mean of its divisors is an integer number (11560793266).

Almost surely, 2^23121586531 is an apocalyptic number.

23121586531 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121586531 is an equidigital number, since it uses as much as digits as its factorization.

23121586531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The spelling of 23121586531 in words is "twenty-three billion, one hundred twenty-one million, five hundred eighty-six thousand, five hundred thirty-one".