331143213 has 16 divisors (see below), whose sum is σ = 461531520. Its totient is φ = 210792384.

The previous prime is 331143157. The next prime is 331143227. The reversal of 331143213 is 312341133.

It is not a de Polignac number, because 331143213 - 2¹⁸ = 330881069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331143213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331143233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38383 + ... + 46211.

It is an arithmetic number, because the mean of its divisors is an integer number (28845720).

Almost surely, 2^331143213 is an apocalyptic number.

It is an amenable number.

331143213 is a deficient number, since it is larger than the sum of its proper divisors (130388307).

331143213 is a wasteful number, since it uses less digits than its factorization.

331143213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8468.

The product of its digits is 648, while the sum is 21.

The square root of 331143213 is about 18197.3408222191. The cubic root of 331143213 is about 691.8393917366.

Adding to 331143213 its reverse (312341133), we get a palindrome (643484346).

The spelling of 331143213 in words is "three hundred thirty-one million, one hundred forty-three thousand, two hundred thirteen".