1222331313 has 24 divisors (see below), whose sum is σ = 1995647520. Its totient is φ = 661711680.

The previous prime is 1222331311. The next prime is 1222331413. The reversal of 1222331313 is 3131332221.

1222331313 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1222331313 - 2¹ = 1222331311 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1222331313.

It is not an unprimeable number, because it can be changed into a prime (1222331311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216028 + ... + 221613.

It is an arithmetic number, because the mean of its divisors is an integer number (83151980).

Almost surely, 2^1222331313 is an apocalyptic number.

It is an amenable number.

1222331313 is a deficient number, since it is larger than the sum of its proper divisors (773316207).

1222331313 is a wasteful number, since it uses less digits than its factorization.

1222331313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437677 (or 437670 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 1222331313 is about 34961.8551138237. The cubic root of 1222331313 is about 1069.2099192718.

Adding to 1222331313 its reverse (3131332221), we get a palindrome (4353663534).

The spelling of 1222331313 in words is "one billion, two hundred twenty-two million, three hundred thirty-one thousand, three hundred thirteen".