331213201 has 4 divisors (see below), whose sum is σ = 361323504. Its totient is φ = 301102900.

The previous prime is 331213189. The next prime is 331213213. The reversal of 331213201 is 102312133.

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 an interprime number because it is at equal distance from previous prime (331213189) and next prime (331213213).

It is a cyclic number.

It is not a de Polignac number, because 331213201 - 2⁹ = 331212689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331219201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15055135 + ... + 15055156.

It is an arithmetic number, because the mean of its divisors is an integer number (90330876).

Almost surely, 2^331213201 is an apocalyptic number.

It is an amenable number.

331213201 is a deficient number, since it is larger than the sum of its proper divisors (30110303).

331213201 is a wasteful number, since it uses less digits than its factorization.

331213201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30110302.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 331213201 is about 18199.2637488443. The cubic root of 331213201 is about 691.8881290025. Note that the first 3 decimals are identical.

Adding to 331213201 its reverse (102312133), we get a palindrome (433525334).

The spelling of 331213201 in words is "three hundred thirty-one million, two hundred thirteen thousand, two hundred one".