31331300421 has 16 divisors (see below), whose sum is σ = 42333831680. Its totient is φ = 20609996400.

The previous prime is 31331300417. The next prime is 31331300453. The reversal of 31331300421 is 12400313313.

It is not a de Polignac number, because 31331300421 - 2² = 31331300417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331300321) 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, 162505 + ... + 298446.

It is an arithmetic number, because the mean of its divisors is an integer number (2645864480).

Almost surely, 2^31331300421 is an apocalyptic number.

It is an amenable number.

31331300421 is a deficient number, since it is larger than the sum of its proper divisors (11002531259).

31331300421 is a wasteful number, since it uses less digits than its factorization.

31331300421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461256.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31331300421 its reverse (12400313313), we get a palindrome (43731613734).

The spelling of 31331300421 in words is "thirty-one billion, three hundred thirty-one million, three hundred thousand, four hundred twenty-one".