231140235 has 24 divisors (see below), whose sum is σ = 372997296. Its totient is φ = 122225920.

The previous prime is 231140227. The next prime is 231140243. The reversal of 231140235 is 532041132.

It is an interprime number because it is at equal distance from previous prime (231140227) and next prime (231140243).

It is not a de Polignac number, because 231140235 - 2³ = 231140227 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281125 + ... + 281945.

It is an arithmetic number, because the mean of its divisors is an integer number (15541554).

Almost surely, 2^231140235 is an apocalyptic number.

231140235 is a deficient number, since it is larger than the sum of its proper divisors (141857061).

231140235 is an equidigital number, since it uses as much as digits as its factorization.

231140235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 231140235 is about 15203.2968464080. The cubic root of 231140235 is about 613.7033823199.

Adding to 231140235 its reverse (532041132), we get a palindrome (763181367).

The spelling of 231140235 in words is "two hundred thirty-one million, one hundred forty thousand, two hundred thirty-five".