31223320231322 has 4 divisors (see below), whose sum is σ = 46834980346986. Its totient is φ = 15611660115660.

The previous prime is 31223320231321. The next prime is 31223320231339. The reversal of 31223320231322 is 22313202332213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 29946056345401 + 1277263885921 = 5472299^2 + 1130161^2 .

It is not an unprimeable number, because it can be changed into a prime (31223320231321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7805830057829 + ... + 7805830057832.

Almost surely, 2^{31223320231322} is an apocalyptic number.

31223320231322 is a deficient number, since it is larger than the sum of its proper divisors (15611660115664).

31223320231322 is a wasteful number, since it uses less digits than its factorization.

31223320231322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15611660115663.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 31223320231322 its reverse (22313202332213), we get a palindrome (53536522563535).

The spelling of 31223320231322 in words is "thirty-one trillion, two hundred twenty-three billion, three hundred twenty million, two hundred thirty-one thousand, three hundred twenty-two".