345931 has 8 divisors (see below), whose sum is σ = 361584. Its totient is φ = 330720.

The previous prime is 345923. The next prime is 345937. The reversal of 345931 is 139543.

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

It is not a de Polignac number, because 345931 - 2³ = 345923 is a prime.

It is a super-2 number, since 2×345931² = 239336513522, 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 = 345896 and 345905.

It is not an unprimeable number, because it can be changed into a prime (345937) 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, 3180 + ... + 3286.

It is an arithmetic number, because the mean of its divisors is an integer number (45198).

2³⁴⁵⁹³¹ is an apocalyptic number.

345931 is a deficient number, since it is larger than the sum of its proper divisors (15653).

345931 is a wasteful number, since it uses less digits than its factorization.

345931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221.

The product of its digits is 1620, while the sum is 25.

The square root of 345931 is about 588.1589921101. The cubic root of 345931 is about 70.1988225006.

The spelling of 345931 in words is "three hundred forty-five thousand, nine hundred thirty-one".