233440231 has 2 divisors, whose sum is σ = 233440232. Its totient is φ = 233440230.

The previous prime is 233440219. The next prime is 233440241. The reversal of 233440231 is 132044332.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 233440231 - 2²³ = 225051623 is a prime.

It is a super-2 number, since 2×233440231² = 108988682898666722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233440241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116720115 + 116720116.

It is an arithmetic number, because the mean of its divisors is an integer number (116720116).

Almost surely, 2^233440231 is an apocalyptic number.

233440231 is a deficient number, since it is larger than the sum of its proper divisors (1).

233440231 is an equidigital number, since it uses as much as digits as its factorization.

233440231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 233440231 is about 15278.7509633478. The cubic root of 233440231 is about 615.7322504994.

Adding to 233440231 its reverse (132044332), we get a palindrome (365484563).

The spelling of 233440231 in words is "two hundred thirty-three million, four hundred forty thousand, two hundred thirty-one".