31022233223213 has 4 divisors (see below), whose sum is σ = 31070629843548. Its totient is φ = 30973836602880.

The previous prime is 31022233223197. The next prime is 31022233223237. The reversal of 31022233223213 is 31232233222013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28819686349609 + 2202546873604 = 5368397^2 + 1484098^2 .

It is a cyclic number.

It is not a de Polignac number, because 31022233223213 - 2⁴ = 31022233223197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022233223413) 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, 24198309206 + ... + 24198310487.

It is an arithmetic number, because the mean of its divisors is an integer number (7767657460887).

Almost surely, 2^{31022233223213} is an apocalyptic number.

It is an amenable number.

31022233223213 is a deficient number, since it is larger than the sum of its proper divisors (48396620335).

31022233223213 is an equidigital number, since it uses as much as digits as its factorization.

31022233223213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48396620334.

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

Adding to 31022233223213 its reverse (31232233222013), we get a palindrome (62254466445226).

The spelling of 31022233223213 in words is "thirty-one trillion, twenty-two billion, two hundred thirty-three million, two hundred twenty-three thousand, two hundred thirteen".