31631312461 has 24 divisors (see below), whose sum is σ = 39011028000. Its totient is φ = 25500684384.

The previous prime is 31631312441. The next prime is 31631312467. The reversal of 31631312461 is 16421313613.

It is not a de Polignac number, because 31631312461 - 2⁹ = 31631311949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31631312467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7195 + ... + 251623.

It is an arithmetic number, because the mean of its divisors is an integer number (1625459500).

Almost surely, 2^31631312461 is an apocalyptic number.

It is an amenable number.

31631312461 is a deficient number, since it is larger than the sum of its proper divisors (7379715539).

31631312461 is a wasteful number, since it uses less digits than its factorization.

31631312461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244601 (or 244594 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The spelling of 31631312461 in words is "thirty-one billion, six hundred thirty-one million, three hundred twelve thousand, four hundred sixty-one".