15172765225 has 12 divisors (see below), whose sum is σ = 18863364096. Its totient is φ = 12106512080.

The previous prime is 15172765219. The next prime is 15172765243. The reversal of 15172765225 is 52256727151.

It is not a de Polignac number, because 15172765225 - 2¹⁷ = 15172634153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 782737 + ... + 801886.

It is an arithmetic number, because the mean of its divisors is an integer number (1571947008).

Almost surely, 2^15172765225 is an apocalyptic number.

It is an amenable number.

15172765225 is a deficient number, since it is larger than the sum of its proper divisors (3690598871).

15172765225 is a wasteful number, since it uses less digits than its factorization.

15172765225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585016 (or 1585011 counting only the distinct ones).

The product of its digits is 294000, while the sum is 43.

The spelling of 15172765225 in words is "fifteen billion, one hundred seventy-two million, seven hundred sixty-five thousand, two hundred twenty-five".