31220313322 has 16 divisors (see below), whose sum is σ = 51100660512. Its totient is φ = 14187475120.

The previous prime is 31220313307. The next prime is 31220313331. The reversal of 31220313322 is 22331302213.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 31220313293 and 31220313302.

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, 88528 + ... + 265099.

It is an arithmetic number, because the mean of its divisors is an integer number (3193791282).

Almost surely, 2^31220313322 is an apocalyptic number.

31220313322 is a deficient number, since it is larger than the sum of its proper divisors (19880347190).

31220313322 is a wasteful number, since it uses less digits than its factorization.

31220313322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357653.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31220313322 its reverse (22331302213), we get a palindrome (53551615535).

The spelling of 31220313322 in words is "thirty-one billion, two hundred twenty million, three hundred thirteen thousand, three hundred twenty-two".