631513025 has 48 divisors (see below), whose sum is σ = 974187648. Its totient is φ = 398976000.

The previous prime is 631512953. The next prime is 631513039. The reversal of 631513025 is 520315136.

It is not a de Polignac number, because 631513025 - 2²⁶ = 564404161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631512985 and 631513003.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55580 + ... + 65970.

It is an arithmetic number, because the mean of its divisors is an integer number (20295576).

Almost surely, 2^631513025 is an apocalyptic number.

631513025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

631513025 is a deficient number, since it is larger than the sum of its proper divisors (342674623).

631513025 is a wasteful number, since it uses less digits than its factorization.

631513025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10442 (or 10437 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 631513025 is about 25129.9229007970. The cubic root of 631513025 is about 857.9476139992.

The spelling of 631513025 in words is "six hundred thirty-one million, five hundred thirteen thousand, twenty-five".