31311431327 has 16 divisors (see below), whose sum is σ = 35120300544. Its totient is φ = 27668088000.

The previous prime is 31311431309. The next prime is 31311431329. The reversal of 31311431327 is 72313411313.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31311431327 - 2³⁴ = 14131562143 is a prime.

It is a super-3 number, since 3×31311431327³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31311431327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311431329) 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 15 ways as a sum of consecutive naturals, for example, 5873 + ... + 250314.

It is an arithmetic number, because the mean of its divisors is an integer number (2195018784).

Almost surely, 2^31311431327 is an apocalyptic number.

31311431327 is a deficient number, since it is larger than the sum of its proper divisors (3808869217).

31311431327 is a wasteful number, since it uses less digits than its factorization.

31311431327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256510.

The product of its digits is 4536, while the sum is 29.

The spelling of 31311431327 in words is "thirty-one billion, three hundred eleven million, four hundred thirty-one thousand, three hundred twenty-seven".