23315521231 has 2 divisors, whose sum is σ = 23315521232. Its totient is φ = 23315521230.

The previous prime is 23315521219. The next prime is 23315521241. The reversal of 23315521231 is 13212551332.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23315521231 - 2¹⁵ = 23315488463 is a prime.

It is a super-2 number, since 2×23315521231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23315521231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23315521241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11657760615 + 11657760616.

It is an arithmetic number, because the mean of its divisors is an integer number (11657760616).

Almost surely, 2^23315521231 is an apocalyptic number.

23315521231 is a deficient number, since it is larger than the sum of its proper divisors (1).

23315521231 is an equidigital number, since it uses as much as digits as its factorization.

23315521231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 28.

The spelling of 23315521231 in words is "twenty-three billion, three hundred fifteen million, five hundred twenty-one thousand, two hundred thirty-one".