331385 has 8 divisors (see below), whose sum is σ = 400896. Its totient is φ = 262960.

The previous prime is 331369. The next prime is 331391. The reversal of 331385 is 583133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331385 - 2⁴ = 331369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 331385.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782 + ... + 1128.

It is an arithmetic number, because the mean of its divisors is an integer number (50112).

2³³¹³⁸⁵ is an apocalyptic number.

It is an amenable number.

331385 is a deficient number, since it is larger than the sum of its proper divisors (69511).

331385 is a wasteful number, since it uses less digits than its factorization.

331385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543.

The product of its digits is 1080, while the sum is 23.

The square root of 331385 is about 575.6604902197. The cubic root of 331385 is about 69.2007734886.

The spelling of 331385 in words is "three hundred thirty-one thousand, three hundred eighty-five".