331384217 has 4 divisors (see below), whose sum is σ = 331685760. Its totient is φ = 331082676.

The previous prime is 331384199. The next prime is 331384219. The reversal of 331384217 is 712483133.

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, and also an emirpimes, since its reverse is a distinct semiprime: 712483133 = 3583 ⋅198851.

It is a cyclic number.

It is not a de Polignac number, because 331384217 - 2⁸ = 331383961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331384219) 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, 149117 + ... + 151322.

It is an arithmetic number, because the mean of its divisors is an integer number (82921440).

Almost surely, 2^331384217 is an apocalyptic number.

It is an amenable number.

331384217 is a deficient number, since it is larger than the sum of its proper divisors (301543).

331384217 is a wasteful number, since it uses less digits than its factorization.

331384217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301542.

The product of its digits is 12096, while the sum is 32.

The square root of 331384217 is about 18203.9615743387. The cubic root of 331384217 is about 692.0071898581.

The spelling of 331384217 in words is "three hundred thirty-one million, three hundred eighty-four thousand, two hundred seventeen".