13255355921 has 2 divisors, whose sum is σ = 13255355922. Its totient is φ = 13255355920.

The previous prime is 13255355807. The next prime is 13255356007. The reversal of 13255355921 is 12955355231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13049863696 + 205492225 = 114236^2 + 14335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13255355921 is a prime.

It is not a weakly prime, because it can be changed into another prime (13255325921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6627677960 + 6627677961.

It is an arithmetic number, because the mean of its divisors is an integer number (6627677961).

Almost surely, 2^13255355921 is an apocalyptic number.

It is an amenable number.

13255355921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13255355921 is an equidigital number, since it uses as much as digits as its factorization.

13255355921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 202500, while the sum is 41.

The spelling of 13255355921 in words is "thirteen billion, two hundred fifty-five million, three hundred fifty-five thousand, nine hundred twenty-one".