31420131967 has 6 divisors (see below), whose sum is σ = 36549949488. Its totient is φ = 26931541644.

The previous prime is 31420131947. The next prime is 31420131989. The reversal of 31420131967 is 76913102413.

It is a de Polignac number, because none of the positive numbers 2^k-31420131967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420131937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 320613543 + ... + 320613640.

It is an arithmetic number, because the mean of its divisors is an integer number (6091658248).

Almost surely, 2^31420131967 is an apocalyptic number.

31420131967 is a deficient number, since it is larger than the sum of its proper divisors (5129817521).

31420131967 is an equidigital number, since it uses as much as digits as its factorization.

31420131967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641227197 (or 641227190 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 31420131967 in words is "thirty-one billion, four hundred twenty million, one hundred thirty-one thousand, nine hundred sixty-seven".