631245560 has 64 divisors (see below), whose sum is σ = 1599436800. Its totient is φ = 222134400.

The previous prime is 631245551. The next prime is 631245577. The reversal of 631245560 is 65542136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9500 + ... + 36779.

It is an arithmetic number, because the mean of its divisors is an integer number (24991200).

Almost surely, 2^631245560 is an apocalyptic number.

It is an amenable number.

631245560 is an abundant number, since it is smaller than the sum of its proper divisors (968191240).

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

631245560 is a wasteful number, since it uses less digits than its factorization.

631245560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46332 (or 46328 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 631245560 is about 25124.6006933444. The cubic root of 631245560 is about 857.8264745805.

Adding to 631245560 its reverse (65542136), we get a palindrome (696787696).

The spelling of 631245560 in words is "six hundred thirty-one million, two hundred forty-five thousand, five hundred sixty".