631103312 has 20 divisors (see below), whose sum is σ = 1397443296. Its totient is φ = 270472800.

The previous prime is 631103311. The next prime is 631103381. The reversal of 631103312 is 213301136.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631103311) 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 3 ways as a sum of consecutive naturals, for example, 2817314 + ... + 2817537.

Almost surely, 2^631103312 is an apocalyptic number.

It is an amenable number.

631103312 is an abundant number, since it is smaller than the sum of its proper divisors (766339984).

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

631103312 is a wasteful number, since it uses less digits than its factorization.

631103312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5634866 (or 5634860 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 631103312 is about 25121.7696828866. The cubic root of 631103312 is about 857.7620341181.

Adding to 631103312 its reverse (213301136), we get a palindrome (844404448).

The spelling of 631103312 in words is "six hundred thirty-one million, one hundred three thousand, three hundred twelve".