31212230322 has 32 divisors (see below), whose sum is σ = 76830106752. Its totient is φ = 8231796864.

The previous prime is 31212230263. The next prime is 31212230347. The reversal of 31212230322 is 22303221213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

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, 28582083 + ... + 28583174.

It is an arithmetic number, because the mean of its divisors is an integer number (2400940836).

Almost surely, 2^31212230322 is an apocalyptic number.

31212230322 is an abundant number, since it is smaller than the sum of its proper divisors (45617876430).

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

31212230322 is a wasteful number, since it uses less digits than its factorization.

31212230322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57165282.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31212230322 its reverse (22303221213), we get a palindrome (53515451535).

The spelling of 31212230322 in words is "thirty-one billion, two hundred twelve million, two hundred thirty thousand, three hundred twenty-two".