23171856313 has 2 divisors, whose sum is σ = 23171856314. Its totient is φ = 23171856312.

The previous prime is 23171856263. The next prime is 23171856373. The reversal of 23171856313 is 31365817132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23107648144 + 64208169 = 152012^2 + 8013^2 .

It is a cyclic number.

It is not a de Polignac number, because 23171856313 - 2²⁵ = 23138301881 is a prime.

It is not a weakly prime, because it can be changed into another prime (23171856373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11585928156 + 11585928157.

It is an arithmetic number, because the mean of its divisors is an integer number (11585928157).

Almost surely, 2^23171856313 is an apocalyptic number.

It is an amenable number.

23171856313 is a deficient number, since it is larger than the sum of its proper divisors (1).

23171856313 is an equidigital number, since it uses as much as digits as its factorization.

23171856313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The spelling of 23171856313 in words is "twenty-three billion, one hundred seventy-one million, eight hundred fifty-six thousand, three hundred thirteen".