331332213 has 4 divisors (see below), whose sum is σ = 441776288. Its totient is φ = 220888140.

The previous prime is 331332173. The next prime is 331332257. The reversal of 331332213 is 312233133.

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 not a de Polignac number, because 331332213 - 2²⁰ = 330283637 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 331332213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331332293) 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, 55222033 + ... + 55222038.

It is an arithmetic number, because the mean of its divisors is an integer number (110444072).

Almost surely, 2^331332213 is an apocalyptic number.

It is an amenable number.

331332213 is a deficient number, since it is larger than the sum of its proper divisors (110444075).

331332213 is a wasteful number, since it uses less digits than its factorization.

331332213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110444074.

The product of its digits is 972, while the sum is 21.

The square root of 331332213 is about 18202.5331478891. The cubic root of 331332213 is about 691.9709891554.

Adding to 331332213 its reverse (312233133), we get a palindrome (643565346).

The spelling of 331332213 in words is "three hundred thirty-one million, three hundred thirty-two thousand, two hundred thirteen".