345231 has 12 divisors (see below), whose sum is σ = 505440. Its totient is φ = 227040.

The previous prime is 345229. The next prime is 345259. The reversal of 345231 is 132543.

It is not a de Polignac number, because 345231 - 2¹ = 345229 is a prime.

It is a super-2 number, since 2×345231² = 238368886722, which contains 22 as substring.

345231 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 586 + ... + 1016.

It is an arithmetic number, because the mean of its divisors is an integer number (42120).

2³⁴⁵²³¹ is an apocalyptic number.

345231 is a deficient number, since it is larger than the sum of its proper divisors (160209).

345231 is a wasteful number, since it uses less digits than its factorization.

345231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 523 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 345231 is about 587.5636135773. The cubic root of 345231 is about 70.1514408380.

Adding to 345231 its reverse (132543), we get a palindrome (477774).

It can be divided in two parts, 345 and 231, that added together give a square (576 = 24²).

The spelling of 345231 in words is "three hundred forty-five thousand, two hundred thirty-one".