118611231 has 4 divisors (see below), whose sum is σ = 158148312. Its totient is φ = 79074152.

The previous prime is 118611223. The next prime is 118611263. The reversal of 118611231 is 132116811.

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 118611231 - 2³ = 118611223 is a prime.

It is a super-2 number, since 2×118611231² = 28137248238670722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118611211) 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, 19768536 + ... + 19768541.

It is an arithmetic number, because the mean of its divisors is an integer number (39537078).

Almost surely, 2^118611231 is an apocalyptic number.

118611231 is a deficient number, since it is larger than the sum of its proper divisors (39537081).

118611231 is an equidigital number, since it uses as much as digits as its factorization.

118611231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39537080.

The product of its digits is 288, while the sum is 24.

The square root of 118611231 is about 10890.8783392342. The cubic root of 118611231 is about 491.3322498233.

The spelling of 118611231 in words is "one hundred eighteen million, six hundred eleven thousand, two hundred thirty-one".