331685445 has 64 divisors (see below), whose sum is σ = 668473344. Its totient is φ = 136684800.

The previous prime is 331685437. The next prime is 331685447. The reversal of 331685445 is 544586133.

It is not a de Polignac number, because 331685445 - 2³ = 331685437 is a prime.

It is a super-2 number, since 2×331685445² = 220030468849696050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331685447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55870 + ... + 61520.

It is an arithmetic number, because the mean of its divisors is an integer number (10444896).

Almost surely, 2^331685445 is an apocalyptic number.

331685445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

331685445 is an abundant number, since it is smaller than the sum of its proper divisors (336787899).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331685445 is a wasteful number, since it uses less digits than its factorization.

331685445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5722.

The product of its digits is 172800, while the sum is 39.

The square root of 331685445 is about 18212.2333885770. The cubic root of 331685445 is about 692.2168043601.

The spelling of 331685445 in words is "three hundred thirty-one million, six hundred eighty-five thousand, four hundred forty-five".