231189163 has 2 divisors, whose sum is σ = 231189164. Its totient is φ = 231189162.

The previous prime is 231189157. The next prime is 231189173. The reversal of 231189163 is 361981132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231189163 - 2²¹ = 229092011 is a prime.

It is not a weakly prime, because it can be changed into another prime (231189173) 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, 115594581 + 115594582.

It is an arithmetic number, because the mean of its divisors is an integer number (115594582).

Almost surely, 2^231189163 is an apocalyptic number.

231189163 is a deficient number, since it is larger than the sum of its proper divisors (1).

231189163 is an equidigital number, since it uses as much as digits as its factorization.

231189163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 231189163 is about 15204.9058859304. The cubic root of 231189163 is about 613.7466823834.

The spelling of 231189163 in words is "two hundred thirty-one million, one hundred eighty-nine thousand, one hundred sixty-three".