231241291 has 2 divisors, whose sum is σ = 231241292. Its totient is φ = 231241290.

The previous prime is 231241247. The next prime is 231241337. The reversal of 231241291 is 192142132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231241291 - 2²³ = 222852683 is a prime.

It is not a weakly prime, because it can be changed into another prime (231244291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115620645 + 115620646.

It is an arithmetic number, because the mean of its divisors is an integer number (115620646).

Almost surely, 2^231241291 is an apocalyptic number.

231241291 is a deficient number, since it is larger than the sum of its proper divisors (1).

231241291 is an equidigital number, since it uses as much as digits as its factorization.

231241291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 231241291 is about 15206.6199728934. The cubic root of 231241291 is about 613.7928076463.

The spelling of 231241291 in words is "two hundred thirty-one million, two hundred forty-one thousand, two hundred ninety-one".