331389725 has 24 divisors (see below), whose sum is σ = 420360000. Its totient is φ = 259079040.

The previous prime is 331389713. The next prime is 331389743. The reversal of 331389725 is 527983133.

It is a de Polignac number, because none of the positive numbers 2^k-331389725 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 292961 + ... + 294089.

It is an arithmetic number, because the mean of its divisors is an integer number (17515000).

Almost surely, 2^331389725 is an apocalyptic number.

It is an amenable number.

331389725 is a deficient number, since it is larger than the sum of its proper divisors (88970275).

331389725 is a wasteful number, since it uses less digits than its factorization.

331389725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1392 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 331389725 is about 18204.1128594612. The cubic root of 331389725 is about 692.0110238312.

The spelling of 331389725 in words is "three hundred thirty-one million, three hundred eighty-nine thousand, seven hundred twenty-five".