31517000272 has 40 divisors (see below), whose sum is σ = 64469038400. Its totient is φ = 14884756992.

The previous prime is 31517000261. The next prime is 31517000321. The reversal of 31517000272 is 27200071513.

It is a super-2 number, since 2×31517000272² (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 31517000272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51372 + ... + 256267.

It is an arithmetic number, because the mean of its divisors is an integer number (1611725960).

Almost surely, 2^31517000272 is an apocalyptic number.

It is an amenable number.

31517000272 is an abundant number, since it is smaller than the sum of its proper divisors (32952038128).

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

31517000272 is a wasteful number, since it uses less digits than its factorization.

31517000272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308003 (or 307997 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

Adding to 31517000272 its reverse (27200071513), we get a palindrome (58717071785).

The spelling of 31517000272 in words is "thirty-one billion, five hundred seventeen million, two hundred seventy-two", and thus it is an aban number.