31130220331320 has 64 divisors (see below), whose sum is σ = 101880721088640. Its totient is φ = 7546720080000.

The previous prime is 31130220331261. The next prime is 31130220331321. The reversal of 31130220331320 is 2313302203113.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130220331321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11791748806 + ... + 11791751445.

It is an arithmetic number, because the mean of its divisors is an integer number (1591886267010).

Almost surely, 2^{31130220331320} is an apocalyptic number.

31130220331320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31130220331320 is an abundant number, since it is smaller than the sum of its proper divisors (70750500757320).

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

31130220331320 is a wasteful number, since it uses less digits than its factorization.

31130220331320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23583500276 (or 23583500272 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31130220331320 its reverse (2313302203113), we get a palindrome (33443522534433).

The spelling of 31130220331320 in words is "thirty-one trillion, one hundred thirty billion, two hundred twenty million, three hundred thirty-one thousand, three hundred twenty".