631216912 has 10 divisors (see below), whose sum is σ = 1222982798. Its totient is φ = 315608448.

The previous prime is 631216897. The next prime is 631216913. The reversal of 631216912 is 219612136.

631216912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 459502096 + 171714816 = 21436^2 + 13104^2 .

It is a super-3 number, since 3×631216912³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (631216913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19725513 + ... + 19725544.

Almost surely, 2^631216912 is an apocalyptic number.

It is an amenable number.

631216912 is a deficient number, since it is larger than the sum of its proper divisors (591765886).

631216912 is a wasteful number, since it uses less digits than its factorization.

631216912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39451065 (or 39451059 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 631216912 is about 25124.0305683622. The cubic root of 631216912 is about 857.8134973885.

The spelling of 631216912 in words is "six hundred thirty-one million, two hundred sixteen thousand, nine hundred twelve".