15255253021 has 2 divisors, whose sum is σ = 15255253022. Its totient is φ = 15255253020.

The previous prime is 15255252973. The next prime is 15255253031. The reversal of 15255253021 is 12035255251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14998900900 + 256352121 = 122470^2 + 16011^2 .

It is a cyclic number.

It is not a de Polignac number, because 15255253021 - 2²⁹ = 14718382109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15255253031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7627626510 + 7627626511.

It is an arithmetic number, because the mean of its divisors is an integer number (7627626511).

Almost surely, 2^15255253021 is an apocalyptic number.

It is an amenable number.

15255253021 is a deficient number, since it is larger than the sum of its proper divisors (1).

15255253021 is an equidigital number, since it uses as much as digits as its factorization.

15255253021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 15255253021 in words is "fifteen billion, two hundred fifty-five million, two hundred fifty-three thousand, twenty-one".