331345 has 8 divisors (see below), whose sum is σ = 454464. Its totient is φ = 227184.

The previous prime is 331339. The next prime is 331349. The reversal of 331345 is 543133.

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

It is a cyclic number.

It is not a de Polignac number, because 331345 - 2³ = 331337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4699 + ... + 4768.

It is an arithmetic number, because the mean of its divisors is an integer number (56808).

2³³¹³⁴⁵ is an apocalyptic number.

331345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

331345 is a deficient number, since it is larger than the sum of its proper divisors (123119).

331345 is an equidigital number, since it uses as much as digits as its factorization.

331345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9479.

The product of its digits is 540, while the sum is 19.

The square root of 331345 is about 575.6257464707. The cubic root of 331345 is about 69.1979890714.

Adding to 331345 its reverse (543133), we get a palindrome (874478).

It can be divided in two parts, 331 and 345, that added together give a palindrome (676).

The spelling of 331345 in words is "three hundred thirty-one thousand, three hundred forty-five".