231240959 has 2 divisors, whose sum is σ = 231240960. Its totient is φ = 231240958.

The previous prime is 231240941. The next prime is 231240967. The reversal of 231240959 is 959042132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231240959 - 2⁸ = 231240703 is a prime.

It is a super-2 number, since 2×231240959² = 106944762238479362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231240929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115620479 + 115620480.

It is an arithmetic number, because the mean of its divisors is an integer number (115620480).

Almost surely, 2^231240959 is an apocalyptic number.

231240959 is a deficient number, since it is larger than the sum of its proper divisors (1).

231240959 is an equidigital number, since it uses as much as digits as its factorization.

231240959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 231240959 is about 15206.6090565912. The cubic root of 231240959 is about 613.7925138993.

The spelling of 231240959 in words is "two hundred thirty-one million, two hundred forty thousand, nine hundred fifty-nine".