331665445 has 8 divisors (see below), whose sum is σ = 398123136. Its totient is φ = 265249296.

The previous prime is 331665437. The next prime is 331665449. The reversal of 331665445 is 544566133.

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

It is a cyclic number.

It is not a de Polignac number, because 331665445 - 2³ = 331665437 is a prime.

It is a super-2 number, since 2×331665445² = 220003934814096050, 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 (331665449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11304 + ... + 28126.

It is an arithmetic number, because the mean of its divisors is an integer number (49765392).

Almost surely, 2^331665445 is an apocalyptic number.

It is an amenable number.

331665445 is a deficient number, since it is larger than the sum of its proper divisors (66457691).

331665445 is a wasteful number, since it uses less digits than its factorization.

331665445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20771.

The product of its digits is 129600, while the sum is 37.

The square root of 331665445 is about 18211.6842988231. The cubic root of 331665445 is about 692.2028909625.

The spelling of 331665445 in words is "three hundred thirty-one million, six hundred sixty-five thousand, four hundred forty-five".