31517417012 has 12 divisors (see below), whose sum is σ = 55217949696. Its totient is φ = 15740859960.

The previous prime is 31517416981. The next prime is 31517417023. The reversal of 31517417012 is 21071471513.

It is a self number, because there is not a number n which added to its sum of digits gives 31517417012.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4458164 + ... + 4465227.

It is an arithmetic number, because the mean of its divisors is an integer number (4601495808).

Almost surely, 2^31517417012 is an apocalyptic number.

It is an amenable number.

31517417012 is a deficient number, since it is larger than the sum of its proper divisors (23700532684).

31517417012 is a wasteful number, since it uses less digits than its factorization.

31517417012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8924278 (or 8924276 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

Adding to 31517417012 its reverse (21071471513), we get a palindrome (52588888525).

The spelling of 31517417012 in words is "thirty-one billion, five hundred seventeen million, four hundred seventeen thousand, twelve".