331887645 has 16 divisors (see below), whose sum is σ = 590022720. Its totient is φ = 177006672.

The previous prime is 331887613. The next prime is 331887679. The reversal of 331887645 is 546788133.

It is not a de Polignac number, because 331887645 - 2⁵ = 331887613 is a prime.

It is a super-3 number, since 3×331887645³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 331887645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1229079 + ... + 1229348.

It is an arithmetic number, because the mean of its divisors is an integer number (36876420).

Almost surely, 2^331887645 is an apocalyptic number.

It is an amenable number.

331887645 is a deficient number, since it is larger than the sum of its proper divisors (258135075).

331887645 is a wasteful number, since it uses less digits than its factorization.

331887645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458441 (or 2458435 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 331887645 is about 18217.7837565386. The cubic root of 331887645 is about 692.3574374084.

The spelling of 331887645 in words is "three hundred thirty-one million, eight hundred eighty-seven thousand, six hundred forty-five".