331308 has 18 divisors (see below), whose sum is σ = 837564. Its totient is φ = 110424.

The previous prime is 331307. The next prime is 331319. The reversal of 331308 is 803133.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (331301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4566 + ... + 4637.

2³³¹³⁰⁸ is an apocalyptic number.

It is an amenable number.

331308 is an abundant number, since it is smaller than the sum of its proper divisors (506256).

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

331308 is a wasteful number, since it uses less digits than its factorization.

331308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9213 (or 9208 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 331308 is about 575.5936066358. The cubic root of 331308 is about 69.1954132859.

The spelling of 331308 in words is "three hundred thirty-one thousand, three hundred eight".