313233233221 has 4 divisors (see below), whose sum is σ = 326852069472. Its totient is φ = 299614396972.

The previous prime is 313233233207. The next prime is 313233233227. The reversal of 313233233221 is 122332332313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 313233233221 - 2¹¹ = 313233231173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 313233233221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313233233227) 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, 6809418091 + ... + 6809418136.

It is an arithmetic number, because the mean of its divisors is an integer number (81713017368).

Almost surely, 2^313233233221 is an apocalyptic number.

It is an amenable number.

313233233221 is a deficient number, since it is larger than the sum of its proper divisors (13618836251).

313233233221 is a wasteful number, since it uses less digits than its factorization.

313233233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13618836250.

The product of its digits is 11664, while the sum is 28.

Adding to 313233233221 its reverse (122332332313), we get a palindrome (435565565534).

The spelling of 313233233221 in words is "three hundred thirteen billion, two hundred thirty-three million, two hundred thirty-three thousand, two hundred twenty-one".