331168645 has 8 divisors (see below), whose sum is σ = 404900856. Its totient is φ = 259935936.

The previous prime is 331168639. The next prime is 331168703. The reversal of 331168645 is 546861133.

It can be written as a sum of positive squares in 4 ways, for example, as 53012961 + 278155684 = 7281^2 + 16678^2 .

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 331168645 - 2²¹ = 329071493 is a prime.

It is a super-2 number, since 2×331168645² = 219345342862272050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 624582 + ... + 625111.

It is an arithmetic number, because the mean of its divisors is an integer number (50612607).

Almost surely, 2^331168645 is an apocalyptic number.

It is an amenable number.

331168645 is a deficient number, since it is larger than the sum of its proper divisors (73732211).

331168645 is a wasteful number, since it uses less digits than its factorization.

331168645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249751.

The product of its digits is 51840, while the sum is 37.

The square root of 331168645 is about 18198.0395922198. The cubic root of 331168645 is about 691.8571025118.

The spelling of 331168645 in words is "three hundred thirty-one million, one hundred sixty-eight thousand, six hundred forty-five".