345331 has 4 divisors (see below), whose sum is σ = 394672. Its totient is φ = 295992.

The previous prime is 345329. The next prime is 345379. The reversal of 345331 is 133543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 345331 - 2¹ = 345329 is a prime.

It is a super-2 number, since 2×345331² = 238506999122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345299 and 345308.

It is not an unprimeable number, because it can be changed into a prime (345311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24660 + ... + 24673.

It is an arithmetic number, because the mean of its divisors is an integer number (98668).

2³⁴⁵³³¹ is an apocalyptic number.

345331 is a deficient number, since it is larger than the sum of its proper divisors (49341).

345331 is an equidigital number, since it uses as much as digits as its factorization.

345331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49340.

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

The square root of 345331 is about 587.6487045846. The cubic root of 345331 is about 70.1582135658.

Adding to 345331 its reverse (133543), we get a palindrome (478874).

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

The spelling of 345331 in words is "three hundred forty-five thousand, three hundred thirty-one".