31222230313 has 4 divisors (see below), whose sum is σ = 31421098180. Its totient is φ = 31023362448.

The previous prime is 31222230271. The next prime is 31222230329. The reversal of 31222230313 is 31303222213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31303222213 = 173 ⋅180943481.

It can be written as a sum of positive squares in 2 ways, for example, as 10713699049 + 20508531264 = 103507^2 + 143208^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222230313 - 2²⁹ = 30685359401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31222230113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99433698 + ... + 99434011.

It is an arithmetic number, because the mean of its divisors is an integer number (7855274545).

Almost surely, 2^31222230313 is an apocalyptic number.

It is an amenable number.

31222230313 is a deficient number, since it is larger than the sum of its proper divisors (198867867).

31222230313 is a wasteful number, since it uses less digits than its factorization.

31222230313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198867866.

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

Adding to 31222230313 its reverse (31303222213), we get a palindrome (62525452526).

The spelling of 31222230313 in words is "thirty-one billion, two hundred twenty-two million, two hundred thirty thousand, three hundred thirteen".