31144544631 has 20 divisors (see below), whose sum is σ = 46606114984. Its totient is φ = 20726636400.

The previous prime is 31144544597. The next prime is 31144544671. The reversal of 31144544631 is 13644544113.

31144544631 is a `hidden beast` number, since 3 + 1 + 14 + 4 + 5 + 4 + 4 + 631 = 666.

It is not a de Polignac number, because 31144544631 - 2⁷ = 31144544503 is a prime.

It is a super-2 number, since 2×31144544631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144544671) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 290440 + ... + 382941.

Almost surely, 2^31144544631 is an apocalyptic number.

31144544631 is a deficient number, since it is larger than the sum of its proper divisors (15461570353).

31144544631 is an equidigital number, since it uses as much as digits as its factorization.

31144544631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673964 (or 673955 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The spelling of 31144544631 in words is "thirty-one billion, one hundred forty-four million, five hundred forty-four thousand, six hundred thirty-one".