31213223322 has 32 divisors (see below), whose sum is σ = 62581232448. Its totient is φ = 10378638336.

The previous prime is 31213223299. The next prime is 31213223357. The reversal of 31213223322 is 22332231213.

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 = 31213223292 and 31213223301.

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, 7135528 + ... + 7139900.

It is an arithmetic number, because the mean of its divisors is an integer number (1955663514).

Almost surely, 2^31213223322 is an apocalyptic number.

31213223322 is an abundant number, since it is smaller than the sum of its proper divisors (31368009126).

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

31213223322 is a wasteful number, since it uses less digits than its factorization.

31213223322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054.

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

Adding to 31213223322 its reverse (22332231213), we get a palindrome (53545454535).

The spelling of 31213223322 in words is "thirty-one billion, two hundred thirteen million, two hundred twenty-three thousand, three hundred twenty-two".