631561252 has 48 divisors (see below), whose sum is σ = 1302376320. Its totient is φ = 262386432.

The previous prime is 631561223. The next prime is 631561261. The reversal of 631561252 is 252165136.

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 15 ways as a sum of consecutive naturals, for example, 117978 + ... + 123214.

It is an arithmetic number, because the mean of its divisors is an integer number (27132840).

Almost surely, 2^631561252 is an apocalyptic number.

It is an amenable number.

631561252 is an abundant number, since it is smaller than the sum of its proper divisors (670815068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631561252 is a wasteful number, since it uses less digits than its factorization.

631561252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5380 (or 5378 counting only the distinct ones).

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

The square root of 631561252 is about 25130.8824357602. The cubic root of 631561252 is about 857.9694531826.

The spelling of 631561252 in words is "six hundred thirty-one million, five hundred sixty-one thousand, two hundred fifty-two".