31311310131431 has 6 divisors (see below), whose sum is σ = 34416564028896. Its totient is φ = 28464827392100.

The previous prime is 31311310131359. The next prime is 31311310131523. The reversal of 31311310131431 is 13413101311313.

It is a happy number.

It is not a de Polignac number, because 31311310131431 - 2²⁶ = 31311243022567 is a prime.

It is a super-2 number, since 2×31311310131431² (a number of 28 digits) contains 22 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 31311310131431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311310131631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129385578935 + ... + 129385579176.

It is an arithmetic number, because the mean of its divisors is an integer number (5736094004816).

Almost surely, 2^{31311310131431} is an apocalyptic number.

31311310131431 is a deficient number, since it is larger than the sum of its proper divisors (3105253897465).

31311310131431 is a wasteful number, since it uses less digits than its factorization.

31311310131431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258771158133 (or 258771158122 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 31311310131431 its reverse (13413101311313), we get a palindrome (44724411442744).

The spelling of 31311310131431 in words is "thirty-one trillion, three hundred eleven billion, three hundred ten million, one hundred thirty-one thousand, four hundred thirty-one".