345131 has 4 divisors (see below), whose sum is σ = 350064. Its totient is φ = 340200.

The previous prime is 345109. The next prime is 345133. The reversal of 345131 is 131543.

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 345131 - 2⁶ = 345067 is a prime.

It is a super-3 number, since 3×345131³ = 123331258766649273, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345131.

It is not an unprimeable number, because it can be changed into a prime (345133) 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, 2360 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (87516).

2³⁴⁵¹³¹ is an apocalyptic number.

345131 is a deficient number, since it is larger than the sum of its proper divisors (4933).

345131 is an equidigital number, since it uses as much as digits as its factorization.

345131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932.

The product of its digits is 180, while the sum is 17.

The square root of 345131 is about 587.4785102453. The cubic root of 345131 is about 70.1446668021.

Adding to 345131 its reverse (131543), we get a palindrome (476674).

The spelling of 345131 in words is "three hundred forty-five thousand, one hundred thirty-one".