631375625 has 10 divisors (see below), whose sum is σ = 788967762. Its totient is φ = 505100000.

The previous prime is 631375607. The next prime is 631375637. The reversal of 631375625 is 526573136.

It can be written as a sum of positive squares in 5 ways, for example, as 88811776 + 542563849 = 9424^2 + 23293^2 .

It is not a de Polignac number, because 631375625 - 2¹⁴ = 631359241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 504476 + ... + 505725.

Almost surely, 2^631375625 is an apocalyptic number.

It is an amenable number.

631375625 is a deficient number, since it is larger than the sum of its proper divisors (157592137).

631375625 is an equidigital number, since it uses as much as digits as its factorization.

631375625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010221 (or 1010206 counting only the distinct ones).

The product of its digits is 113400, while the sum is 38.

The square root of 631375625 is about 25127.1889593723. The cubic root of 631375625 is about 857.8853874904.

The spelling of 631375625 in words is "six hundred thirty-one million, three hundred seventy-five thousand, six hundred twenty-five".