15631250625 has 45 divisors (see below), whose sum is σ = 28230995221. Its totient is φ = 8331666000.

The previous prime is 15631250599. The next prime is 15631250669. The reversal of 15631250625 is 52605213651.

The square root of 15631250625 is 125025.

It is a perfect power (a square), and thus also a powerful number.

15631250625 is a `hidden beast` number, since 1 + 5 + 6 + 3 + 1 + 25 + 0 + 625 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1225490049 + 14405760576 = 35007^2 + 120024^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 15631250625 - 2⁹ = 15631250113 is a prime.

It is a super-2 number, since 2×15631250625² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15631250625.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 9376042 + ... + 9377708.

Almost surely, 2^15631250625 is an apocalyptic number.

15631250625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15631250625 is the 125025-th square number.

15631250625 is the 62513-rd centered octagonal number.

It is an amenable number.

15631250625 is a deficient number, since it is larger than the sum of its proper divisors (12599744596).

15631250625 is an frugal number, since it uses more digits than its factorization.

15631250625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360 (or 1675 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Multiplying 15631250625 by its sum of digits (36), we get a square (562725022500 = 750150²).

It can be divided in two parts, 15631 and 250625, that added together give a square (266256 = 516²).

The spelling of 15631250625 in words is "fifteen billion, six hundred thirty-one million, two hundred fifty thousand, six hundred twenty-five".