631875625 has 10 divisors (see below), whose sum is σ = 789592562. Its totient is φ = 505500000.

The previous prime is 631875617. The next prime is 631875649. The reversal of 631875625 is 526578136.

It can be written as a sum of positive squares in 5 ways, for example, as 193098816 + 438776809 = 13896^2 + 20947^2 .

It is not a de Polignac number, because 631875625 - 2³ = 631875617 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 (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 504876 + ... + 506125.

Almost surely, 2^631875625 is an apocalyptic number.

It is an amenable number.

631875625 is a deficient number, since it is larger than the sum of its proper divisors (157716937).

631875625 is an equidigital number, since it uses as much as digits as its factorization.

631875625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011021 (or 1011006 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 631875625 is about 25137.1363723078. The cubic root of 631875625 is about 858.1117870624. Note that the first 3 decimals are identical.

The spelling of 631875625 in words is "six hundred thirty-one million, eight hundred seventy-five thousand, six hundred twenty-five".