31133131220320 has 96 divisors (see below), whose sum is σ = 74913684390720. Its totient is φ = 12224238458880.

The previous prime is 31133131220291. The next prime is 31133131220341. The reversal of 31133131220320 is 2302213133113.

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, 3382387 + ... + 8585266.

It is an arithmetic number, because the mean of its divisors is an integer number (780350879070).

Almost surely, 2^{31133131220320} is an apocalyptic number.

It is an amenable number.

31133131220320 is an abundant number, since it is smaller than the sum of its proper divisors (43780553170400).

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

31133131220320 is a wasteful number, since it uses less digits than its factorization.

31133131220320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11967968 (or 11967960 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31133131220320 its reverse (2302213133113), we get a palindrome (33435344353433).

The spelling of 31133131220320 in words is "thirty-one trillion, one hundred thirty-three billion, one hundred thirty-one million, two hundred twenty thousand, three hundred twenty".