31102440242 has 32 divisors (see below), whose sum is σ = 47846894400. Its totient is φ = 15158803968.

The previous prime is 31102440181. The next prime is 31102440277. The reversal of 31102440242 is 24204420113.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12248609 + ... + 12251147.

It is an arithmetic number, because the mean of its divisors is an integer number (1495215450).

Almost surely, 2^31102440242 is an apocalyptic number.

31102440242 is a deficient number, since it is larger than the sum of its proper divisors (16744454158).

31102440242 is a wasteful number, since it uses less digits than its factorization.

31102440242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 31102440242 its reverse (24204420113), we get a palindrome (55306860355).

The spelling of 31102440242 in words is "thirty-one billion, one hundred two million, four hundred forty thousand, two hundred forty-two".