31312315032031 has 4 divisors (see below), whose sum is σ = 34158889125864. Its totient is φ = 28465740938200.

The previous prime is 31312315031957. The next prime is 31312315032059. The reversal of 31312315032031 is 13023051321313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31312315032031 - 2²¹ = 31312312934879 is a prime.

It is a super-2 number, since 2×31312315032031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312315032731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1423287046900 + ... + 1423287046921.

It is an arithmetic number, because the mean of its divisors is an integer number (8539722281466).

Almost surely, 2^{31312315032031} is an apocalyptic number.

31312315032031 is a deficient number, since it is larger than the sum of its proper divisors (2846574093833).

31312315032031 is a wasteful number, since it uses less digits than its factorization.

31312315032031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846574093832.

The product of its (nonzero) digits is 4860, while the sum is 28.

Adding to 31312315032031 its reverse (13023051321313), we get a palindrome (44335366353344).

The spelling of 31312315032031 in words is "thirty-one trillion, three hundred twelve billion, three hundred fifteen million, thirty-two thousand, thirty-one".