31312223322 has 128 divisors (see below), whose sum is σ = 68366204928. Its totient is φ = 9534412800.

The previous prime is 31312223321. The next prime is 31312223429. The reversal of 31312223322 is 22332221313.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31312223292 and 31312223301.

It is not an unprimeable number, because it can be changed into a prime (31312223321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94598697 + ... + 94599027.

It is an arithmetic number, because the mean of its divisors is an integer number (534110976).

Almost surely, 2^31312223322 is an apocalyptic number.

31312223322 is an abundant number, since it is smaller than the sum of its proper divisors (37053981606).

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

31312223322 is a wasteful number, since it uses less digits than its factorization.

31312223322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

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

Adding to 31312223322 its reverse (22332221313), we get a palindrome (53644444635).

The spelling of 31312223322 in words is "thirty-one billion, three hundred twelve million, two hundred twenty-three thousand, three hundred twenty-two".