231206163 has 4 divisors (see below), whose sum is σ = 308274888. Its totient is φ = 154137440.

The previous prime is 231206159. The next prime is 231206179. The reversal of 231206163 is 361602132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231206163 - 2² = 231206159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231206123) 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 in 3 ways as a sum of consecutive naturals, for example, 38534358 + ... + 38534363.

It is an arithmetic number, because the mean of its divisors is an integer number (77068722).

Almost surely, 2^231206163 is an apocalyptic number.

231206163 is a deficient number, since it is larger than the sum of its proper divisors (77068725).

231206163 is an equidigital number, since it uses as much as digits as its factorization.

231206163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77068724.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 231206163 is about 15205.4649057502. The cubic root of 231206163 is about 613.7617255307.

Adding to 231206163 its reverse (361602132), we get a palindrome (592808295).

The spelling of 231206163 in words is "two hundred thirty-one million, two hundred six thousand, one hundred sixty-three".