13313552521 has 2 divisors, whose sum is σ = 13313552522. Its totient is φ = 13313552520.

The previous prime is 13313552509. The next prime is 13313552563. The reversal of 13313552521 is 12525531331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11934470025 + 1379082496 = 109245^2 + 37136^2 .

It is a cyclic number.

It is not a de Polignac number, because 13313552521 - 2⁵ = 13313552489 is a prime.

It is not a weakly prime, because it can be changed into another prime (13313552221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656776260 + 6656776261.

It is an arithmetic number, because the mean of its divisors is an integer number (6656776261).

Almost surely, 2^13313552521 is an apocalyptic number.

It is an amenable number.

13313552521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13313552521 is an equidigital number, since it uses as much as digits as its factorization.

13313552521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 31.

The spelling of 13313552521 in words is "thirteen billion, three hundred thirteen million, five hundred fifty-two thousand, five hundred twenty-one".