31118742347 has 32 divisors (see below), whose sum is σ = 40214568960. Its totient is φ = 23378050080.

The previous prime is 31118742289. The next prime is 31118742373. The reversal of 31118742347 is 74324781113.

It is a happy number.

It is not a de Polignac number, because 31118742347 - 2²⁴ = 31101965131 is a prime.

It is a super-2 number, since 2×31118742347² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31118742047) 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, 178304 + ... + 306642.

It is an arithmetic number, because the mean of its divisors is an integer number (1256705280).

Almost surely, 2^31118742347 is an apocalyptic number.

31118742347 is a deficient number, since it is larger than the sum of its proper divisors (9095826613).

31118742347 is a wasteful number, since it uses less digits than its factorization.

31118742347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128471.

The product of its digits is 112896, while the sum is 41.

The spelling of 31118742347 in words is "thirty-one billion, one hundred eighteen million, seven hundred forty-two thousand, three hundred forty-seven".