631515460 has 48 divisors (see below), whose sum is σ = 1346538816. Its totient is φ = 248749952.

The previous prime is 631515449. The next prime is 631515487. The reversal of 631515460 is 64515136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924279 + ... + 924961.

It is an arithmetic number, because the mean of its divisors is an integer number (28052892).

Almost surely, 2^631515460 is an apocalyptic number.

It is an amenable number.

631515460 is an abundant number, since it is smaller than the sum of its proper divisors (715023356).

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

631515460 is a wasteful number, since it uses less digits than its factorization.

631515460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332 (or 1330 counting only the distinct ones).

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

The square root of 631515460 is about 25129.9713489689. The cubic root of 631515460 is about 857.9487166947.

The spelling of 631515460 in words is "six hundred thirty-one million, five hundred fifteen thousand, four hundred sixty".