31047304431 has 32 divisors (see below), whose sum is σ = 48674320128. Its totient is φ = 17354557440.

The previous prime is 31047304427. The next prime is 31047304433. The reversal of 31047304431 is 13440374013.

It is not a de Polignac number, because 31047304431 - 2² = 31047304427 is a prime.

It is a super-2 number, since 2×31047304431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31047304433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 492360 + ... + 551826.

It is an arithmetic number, because the mean of its divisors is an integer number (1521072504).

Almost surely, 2^31047304431 is an apocalyptic number.

31047304431 is a deficient number, since it is larger than the sum of its proper divisors (17627015697).

31047304431 is a wasteful number, since it uses less digits than its factorization.

31047304431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60711.

The product of its (nonzero) digits is 12096, while the sum is 30.

Adding to 31047304431 its reverse (13440374013), we get a palindrome (44487678444).

The spelling of 31047304431 in words is "thirty-one billion, forty-seven million, three hundred four thousand, four hundred thirty-one".