331445000 has 80 divisors (see below), whose sum is σ = 783499200. Its totient is φ = 131400000.

The previous prime is 331444999. The next prime is 331445017. The reversal of 331445000 is 544133.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 754781 + ... + 755219.

It is an arithmetic number, because the mean of its divisors is an integer number (9793740).

Almost surely, 2^331445000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331445000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391749600).

331445000 is an abundant number, since it is smaller than the sum of its proper divisors (452054200).

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

331445000 is a wasteful number, since it uses less digits than its factorization.

331445000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 331445000 is about 18205.6309970295. The cubic root of 331445000 is about 692.0494969440.

Adding to 331445000 its reverse (544133), we get a palindrome (331989133).

The spelling of 331445000 in words is "three hundred thirty-one million, four hundred forty-five thousand".