31232023213 has 4 divisors (see below), whose sum is σ = 31232666908. Its totient is φ = 31231379520.

The previous prime is 31232023181. The next prime is 31232023223.

31232023213 is nontrivially palindromic in base 10.

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 22928622084 + 8303401129 = 151422^2 + 91123^2 .

It is a cyclic number.

It is not a de Polignac number, because 31232023213 - 2⁵ = 31232023181 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 (31232023223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242556 + ... + 348277.

It is an arithmetic number, because the mean of its divisors is an integer number (7808166727).

Almost surely, 2^31232023213 is an apocalyptic number.

It is an amenable number.

31232023213 is a deficient number, since it is larger than the sum of its proper divisors (643695).

31232023213 is an equidigital number, since it uses as much as digits as its factorization.

31232023213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643694.

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

It can be divided in two parts, 312320 and 23213, that added together give a palindrome (335533).

The spelling of 31232023213 in words is "thirty-one billion, two hundred thirty-two million, twenty-three thousand, two hundred thirteen".