235988231 has 2 divisors, whose sum is σ = 235988232. Its totient is φ = 235988230.

The previous prime is 235988209. The next prime is 235988243. The reversal of 235988231 is 132889532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 235988231 - 2¹⁸ = 235726087 is a prime.

It is a super-2 number, since 2×235988231² = 111380890341018722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235988261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117994115 + 117994116.

It is an arithmetic number, because the mean of its divisors is an integer number (117994116).

Almost surely, 2^235988231 is an apocalyptic number.

235988231 is a deficient number, since it is larger than the sum of its proper divisors (1).

235988231 is an equidigital number, since it uses as much as digits as its factorization.

235988231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 235988231 is about 15361.9084426382. The cubic root of 235988231 is about 617.9643878963.

The spelling of 235988231 in words is "two hundred thirty-five million, nine hundred eighty-eight thousand, two hundred thirty-one".