631320315 has 16 divisors (see below), whose sum is σ = 1063276800. Its totient is φ = 318982752.

The previous prime is 631320311. The next prime is 631320323. The reversal of 631320315 is 513023136.

It is a happy number.

It is not a de Polignac number, because 631320315 - 2² = 631320311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631320311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107295 + ... + 1107864.

It is an arithmetic number, because the mean of its divisors is an integer number (66454800).

Almost surely, 2^631320315 is an apocalyptic number.

631320315 is a deficient number, since it is larger than the sum of its proper divisors (431956485).

631320315 is a wasteful number, since it uses less digits than its factorization.

631320315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215186.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 631320315 is about 25126.0883346374. The cubic root of 631320315 is about 857.8603358283.

The spelling of 631320315 in words is "six hundred thirty-one million, three hundred twenty thousand, three hundred fifteen".