331399725 has 48 divisors (see below), whose sum is σ = 562142592. Its totient is φ = 172207360.

The previous prime is 331399723. The next prime is 331399759. The reversal of 331399725 is 527993133.

It is not a de Polignac number, because 331399725 - 2¹ = 331399723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331399723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1045267 + ... + 1045583.

It is an arithmetic number, because the mean of its divisors is an integer number (11711304).

Almost surely, 2^331399725 is an apocalyptic number.

It is an amenable number.

331399725 is a deficient number, since it is larger than the sum of its proper divisors (230742867).

331399725 is a wasteful number, since it uses less digits than its factorization.

331399725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 641 counting only the distinct ones).

The product of its digits is 153090, while the sum is 42.

The square root of 331399725 is about 18204.3875205951. The cubic root of 331399725 is about 692.0179844580.

The spelling of 331399725 in words is "three hundred thirty-one million, three hundred ninety-nine thousand, seven hundred twenty-five".