31347431742 has 32 divisors (see below), whose sum is σ = 68400708480. Its totient is φ = 9498345120.

The previous prime is 31347431723. The next prime is 31347431749. The reversal of 31347431742 is 24713474313.

It is a super-2 number, since 2×31347431742² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31347431742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31347431749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1281684 + ... + 1305912.

It is an arithmetic number, because the mean of its divisors is an integer number (2137522140).

Almost surely, 2^31347431742 is an apocalyptic number.

31347431742 is an abundant number, since it is smaller than the sum of its proper divisors (37053276738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31347431742 is a wasteful number, since it uses less digits than its factorization.

31347431742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43848.

The product of its digits is 169344, while the sum is 39.

The spelling of 31347431742 in words is "thirty-one billion, three hundred forty-seven million, four hundred thirty-one thousand, seven hundred forty-two".