31517624242 has 24 divisors (see below), whose sum is σ = 51299965440. Its totient is φ = 14516152560.

The previous prime is 31517624219. The next prime is 31517624287. The reversal of 31517624242 is 24242671513.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64567 + ... + 259237.

It is an arithmetic number, because the mean of its divisors is an integer number (2137498560).

Almost surely, 2^31517624242 is an apocalyptic number.

31517624242 is a deficient number, since it is larger than the sum of its proper divisors (19782341198).

31517624242 is a wasteful number, since it uses less digits than its factorization.

31517624242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195178 (or 195165 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The spelling of 31517624242 in words is "thirty-one billion, five hundred seventeen million, six hundred twenty-four thousand, two hundred forty-two".