631288225 has 6 divisors (see below), whose sum is σ = 782797430. Its totient is φ = 505030560.

The previous prime is 631288219. The next prime is 631288241. The reversal of 631288225 is 522882136.

It can be written as a sum of positive squares in 3 ways, for example, as 725904 + 630562321 = 852^2 + 25111^2 .

It is a de Polignac number, because none of the positive numbers 2^k-631288225 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12625740 + ... + 12625789.

Almost surely, 2^631288225 is an apocalyptic number.

It is an amenable number.

631288225 is a deficient number, since it is larger than the sum of its proper divisors (151509205).

631288225 is a wasteful number, since it uses less digits than its factorization.

631288225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25251539 (or 25251534 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 631288225 is about 25125.4497472185. The cubic root of 631288225 is about 857.8458005736.

The spelling of 631288225 in words is "six hundred thirty-one million, two hundred eighty-eight thousand, two hundred twenty-five".