231163487 has 2 divisors, whose sum is σ = 231163488. Its totient is φ = 231163486.

The previous prime is 231163459. The next prime is 231163489. The reversal of 231163487 is 784361132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231163487 is a prime.

Together with 231163489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231163489) by changing a digit.

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 as a sum of consecutive naturals, namely, 115581743 + 115581744.

It is an arithmetic number, because the mean of its divisors is an integer number (115581744).

Almost surely, 2^231163487 is an apocalyptic number.

231163487 is a deficient number, since it is larger than the sum of its proper divisors (1).

231163487 is an equidigital number, since it uses as much as digits as its factorization.

231163487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 231163487 is about 15204.0615297361. The cubic root of 231163487 is about 613.7239605236.

The spelling of 231163487 in words is "two hundred thirty-one million, one hundred sixty-three thousand, four hundred eighty-seven".