631513390 has 16 divisors (see below), whose sum is σ = 1138340160. Its totient is φ = 252246240.

The previous prime is 631513387. The next prime is 631513417. The reversal of 631513390 is 93315136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37446 + ... + 51625.

It is an arithmetic number, because the mean of its divisors is an integer number (71146260).

Almost surely, 2^631513390 is an apocalyptic number.

631513390 is a deficient number, since it is larger than the sum of its proper divisors (506826770).

631513390 is a wasteful number, since it uses less digits than its factorization.

631513390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89787.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 631513390 is about 25129.9301630546. The cubic root of 631513390 is about 857.9477792905.

The spelling of 631513390 in words is "six hundred thirty-one million, five hundred thirteen thousand, three hundred ninety".