631557012 has 24 divisors (see below), whose sum is σ = 1524448800. Its totient is φ = 203259616.

The previous prime is 631557011. The next prime is 631557049. The reversal of 631557012 is 210755136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631557011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907062 + ... + 907757.

It is an arithmetic number, because the mean of its divisors is an integer number (63518700).

Almost surely, 2^631557012 is an apocalyptic number.

It is an amenable number.

631557012 is an abundant number, since it is smaller than the sum of its proper divisors (892891788).

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

631557012 is a wasteful number, since it uses less digits than its factorization.

631557012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814855 (or 1814853 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 631557012 is about 25130.7980772597. The cubic root of 631557012 is about 857.9675331796.

The spelling of 631557012 in words is "six hundred thirty-one million, five hundred fifty-seven thousand, twelve".