163118231 has 4 divisors (see below), whose sum is σ = 170210352. Its totient is φ = 156026112.

The previous prime is 163118201. The next prime is 163118233. The reversal of 163118231 is 132811361.

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

It is not a de Polignac number, because 163118231 - 2¹⁴ = 163101847 is a prime.

It is a super-2 number, since 2×163118231² = 53215114569138722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163118231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163118233) 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, 3546026 + ... + 3546071.

It is an arithmetic number, because the mean of its divisors is an integer number (42552588).

Almost surely, 2^163118231 is an apocalyptic number.

163118231 is a deficient number, since it is larger than the sum of its proper divisors (7092121).

163118231 is an equidigital number, since it uses as much as digits as its factorization.

163118231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7092120.

The product of its digits is 864, while the sum is 26.

The square root of 163118231 is about 12771.7747787847. The cubic root of 163118231 is about 546.3875995244.

Adding to 163118231 its reverse (132811361), we get a palindrome (295929592).

It can be divided in two parts, 16311 and 8231, that added together give a palindrome (24542).

The spelling of 163118231 in words is "one hundred sixty-three million, one hundred eighteen thousand, two hundred thirty-one".