331922397 has 4 divisors (see below), whose sum is σ = 442563200. Its totient is φ = 221281596.

The previous prime is 331922369. The next prime is 331922431. The reversal of 331922397 is 793229133.

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 331922397 - 2⁶ = 331922333 is a prime.

It is a super-2 number, since 2×331922397² = 220344955260451218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331929397) 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, 55320397 + ... + 55320402.

It is an arithmetic number, because the mean of its divisors is an integer number (110640800).

Almost surely, 2^331922397 is an apocalyptic number.

It is an amenable number.

331922397 is a deficient number, since it is larger than the sum of its proper divisors (110640803).

331922397 is a wasteful number, since it uses less digits than its factorization.

331922397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110640802.

The product of its digits is 61236, while the sum is 39.

The square root of 331922397 is about 18218.7375248671. The cubic root of 331922397 is about 692.3816021785.

The spelling of 331922397 in words is "three hundred thirty-one million, nine hundred twenty-two thousand, three hundred ninety-seven".