331161213 has 8 divisors (see below), whose sum is σ = 442503808. Its totient is φ = 220296384.

The previous prime is 331161191. The next prime is 331161247. The reversal of 331161213 is 312161133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331161213 - 2⁹ = 331160701 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 331161213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331161113) 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 7 ways as a sum of consecutive naturals, for example, 117820 + ... + 120597.

It is an arithmetic number, because the mean of its divisors is an integer number (55312976).

Almost surely, 2^331161213 is an apocalyptic number.

It is an amenable number.

331161213 is a deficient number, since it is larger than the sum of its proper divisors (111342595).

331161213 is a wasteful number, since it uses less digits than its factorization.

331161213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238883.

The product of its digits is 324, while the sum is 21.

The square root of 331161213 is about 18197.8353932549. The cubic root of 331161213 is about 691.8519269811.

The spelling of 331161213 in words is "three hundred thirty-one million, one hundred sixty-one thousand, two hundred thirteen".