31322003213220 has 48 divisors (see below), whose sum is σ = 88078010791680. Its totient is φ = 8316686400256.

The previous prime is 31322003213209. The next prime is 31322003213227. The reversal of 31322003213220 is 2231230022313.

It is not an unprimeable number, because it can be changed into a prime (31322003213227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1120229340 + ... + 1120257299.

It is an arithmetic number, because the mean of its divisors is an integer number (1834958558160).

Almost surely, 2^{31322003213220} is an apocalyptic number.

31322003213220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31322003213220 is an abundant number, since it is smaller than the sum of its proper divisors (56756007578460).

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

31322003213220 is a wasteful number, since it uses less digits than its factorization.

31322003213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240486884 (or 2240486882 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31322003213220 its reverse (2231230022313), we get a palindrome (33553233235533).

The spelling of 31322003213220 in words is "thirty-one trillion, three hundred twenty-two billion, three million, two hundred thirteen thousand, two hundred twenty".