31816133140 has 48 divisors (see below), whose sum is σ = 72911502720. Its totient is φ = 11565751680.

The previous prime is 31816133123. The next prime is 31816133201. The reversal of 31816133140 is 4133161813.

It is a congruent number.

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, 708394 + ... + 751966.

It is an arithmetic number, because the mean of its divisors is an integer number (1518989640).

Almost surely, 2^31816133140 is an apocalyptic number.

It is an amenable number.

31816133140 is an abundant number, since it is smaller than the sum of its proper divisors (41095369580).

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

31816133140 is a wasteful number, since it uses less digits than its factorization.

31816133140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46912 (or 46910 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

Adding to 31816133140 its reverse (4133161813), we get a palindrome (35949294953).

The spelling of 31816133140 in words is "thirty-one billion, eight hundred sixteen million, one hundred thirty-three thousand, one hundred forty".