231315587 has 2 divisors, whose sum is σ = 231315588. Its totient is φ = 231315586.

The previous prime is 231315523. The next prime is 231315593. The reversal of 231315587 is 785513132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231315587 - 2⁶ = 231315523 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (231315517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115657793 + 115657794.

It is an arithmetic number, because the mean of its divisors is an integer number (115657794).

Almost surely, 2^231315587 is an apocalyptic number.

231315587 is a deficient number, since it is larger than the sum of its proper divisors (1).

231315587 is an equidigital number, since it uses as much as digits as its factorization.

231315587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 231315587 is about 15209.0626601379. The cubic root of 231315587 is about 613.8585362008.

The spelling of 231315587 in words is "two hundred thirty-one million, three hundred fifteen thousand, five hundred eighty-seven".