231444163 has 4 divisors (see below), whose sum is σ = 235811088. Its totient is φ = 227077240.

The previous prime is 231444151. The next prime is 231444173. The reversal of 231444163 is 361444132.

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 231444163 - 2¹⁷ = 231313091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231444173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2183383 + ... + 2183488.

It is an arithmetic number, because the mean of its divisors is an integer number (58952772).

Almost surely, 2^231444163 is an apocalyptic number.

231444163 is a deficient number, since it is larger than the sum of its proper divisors (4366925).

231444163 is an equidigital number, since it uses as much as digits as its factorization.

231444163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366924.

The product of its digits is 6912, while the sum is 28.

The square root of 231444163 is about 15213.2890263743. The cubic root of 231444163 is about 613.9722522094.

Adding to 231444163 its reverse (361444132), we get a palindrome (592888295).

The spelling of 231444163 in words is "two hundred thirty-one million, four hundred forty-four thousand, one hundred sixty-three".