631124881 has 16 divisors (see below), whose sum is σ = 705369600. Its totient is φ = 561178368.

The previous prime is 631124821. The next prime is 631124891. The reversal of 631124881 is 188421136.

631124881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 631124881 - 2²⁹ = 94253969 is a prime.

It is a super-2 number, since 2×631124881² = 796637230834528322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631124801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123136 + ... + 128158.

It is an arithmetic number, because the mean of its divisors is an integer number (44085600).

Almost surely, 2^631124881 is an apocalyptic number.

It is an amenable number.

631124881 is a deficient number, since it is larger than the sum of its proper divisors (74244719).

631124881 is a wasteful number, since it uses less digits than its factorization.

631124881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448.

The product of its digits is 9216, while the sum is 34.

The square root of 631124881 is about 25122.1989682432. The cubic root of 631124881 is about 857.7718058191.

The spelling of 631124881 in words is "six hundred thirty-one million, one hundred twenty-four thousand, eight hundred eighty-one".