233431 has 4 divisors (see below), whose sum is σ = 254664. Its totient is φ = 212200.

The previous prime is 233423. The next prime is 233437. The reversal of 233431 is 134332.

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 233431 - 2³ = 233423 is a prime.

It is a super-2 number, since 2×233431² = 108980063522, which contains 22 as substring.

It is a Duffinian number.

233431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10600 + ... + 10621.

It is an arithmetic number, because the mean of its divisors is an integer number (63666).

2²³³⁴³¹ is an apocalyptic number.

233431 is a deficient number, since it is larger than the sum of its proper divisors (21233).

233431 is a wasteful number, since it uses less digits than its factorization.

233431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21232.

The product of its digits is 216, while the sum is 16.

The square root of 233431 is about 483.1469755675. The cubic root of 233431 is about 61.5724134361.

Adding to 233431 its reverse (134332), we get a palindrome (367763).

Subtracting from 233431 its reverse (134332), we obtain a palindrome (99099).

It can be divided in two parts, 2 and 33431, that added together give a palindrome (33433).

The spelling of 233431 in words is "two hundred thirty-three thousand, four hundred thirty-one".