31223032213 has 4 divisors (see below), whose sum is σ = 31599213408. Its totient is φ = 30846851020.

The previous prime is 31223032199. The next prime is 31223032237.

31223032213 is nontrivially palindromic in base 10.

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 31223032213 - 2³³ = 22633097621 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 (31223035213) 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, 188090473 + ... + 188090638.

It is an arithmetic number, because the mean of its divisors is an integer number (7899803352).

Almost surely, 2^31223032213 is an apocalyptic number.

It is an amenable number.

31223032213 is a deficient number, since it is larger than the sum of its proper divisors (376181195).

31223032213 is an equidigital number, since it uses as much as digits as its factorization.

31223032213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376181194.

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

It can be divided in two parts, 312230 and 32213, that added together give a palindrome (344443).

The spelling of 31223032213 in words is "thirty-one billion, two hundred twenty-three million, thirty-two thousand, two hundred thirteen".