23315077357521 has 4 divisors (see below), whose sum is σ = 31086769810032. Its totient is φ = 15543384905012.

The previous prime is 23315077357483. The next prime is 23315077357529. The reversal of 23315077357521 is 12575377051332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23315077357521 - 2⁷ = 23315077357393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23315077357529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3885846226251 + ... + 3885846226256.

It is an arithmetic number, because the mean of its divisors is an integer number (7771692452508).

Almost surely, 2^{23315077357521} is an apocalyptic number.

It is an amenable number.

23315077357521 is a deficient number, since it is larger than the sum of its proper divisors (7771692452511).

23315077357521 is an equidigital number, since it uses as much as digits as its factorization.

23315077357521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771692452510.

The product of its (nonzero) digits is 4630500, while the sum is 51.

The spelling of 23315077357521 in words is "twenty-three trillion, three hundred fifteen billion, seventy-seven million, three hundred fifty-seven thousand, five hundred twenty-one".