631165225 has 12 divisors (see below), whose sum is σ = 784052496. Its totient is φ = 504024080.

The previous prime is 631165211. The next prime is 631165243. The reversal of 631165225 is 522561136.

631165225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 631165225 - 2⁷ = 631165097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8347 + ... + 36496.

It is an arithmetic number, because the mean of its divisors is an integer number (65337708).

Almost surely, 2^631165225 is an apocalyptic number.

It is an amenable number.

631165225 is a deficient number, since it is larger than the sum of its proper divisors (152887271).

631165225 is a wasteful number, since it uses less digits than its factorization.

631165225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45416 (or 45411 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 631165225 is about 25123.0019105998. The cubic root of 631165225 is about 857.7900828191.

The spelling of 631165225 in words is "six hundred thirty-one million, one hundred sixty-five thousand, two hundred twenty-five".