231491163 has 8 divisors (see below), whose sum is σ = 309270528. Its totient is φ = 154019624.

The previous prime is 231491153. The next prime is 231491173. The reversal of 231491163 is 361194132.

It is an interprime number because it is at equal distance from previous prime (231491153) and next prime (231491173).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231491163 - 2⁴ = 231491147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231491163.

It is not an unprimeable number, because it can be changed into a prime (231491123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75195 + ... + 78212.

It is an arithmetic number, because the mean of its divisors is an integer number (38658816).

Almost surely, 2^231491163 is an apocalyptic number.

231491163 is a deficient number, since it is larger than the sum of its proper divisors (77779365).

231491163 is a wasteful number, since it uses less digits than its factorization.

231491163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153913.

The product of its digits is 3888, while the sum is 30.

The square root of 231491163 is about 15214.8336500929. The cubic root of 231491163 is about 614.0138097387.

The spelling of 231491163 in words is "two hundred thirty-one million, four hundred ninety-one thousand, one hundred sixty-three".