118915231 has 2 divisors, whose sum is σ = 118915232. Its totient is φ = 118915230.

The previous prime is 118915219. The next prime is 118915271. The reversal of 118915231 is 132519811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 118915231 - 2¹¹ = 118913183 is a prime.

It is a super-2 number, since 2×118915231² = 28281664327566722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 118915193 and 118915202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118915271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59457615 + 59457616.

It is an arithmetic number, because the mean of its divisors is an integer number (59457616).

Almost surely, 2^118915231 is an apocalyptic number.

118915231 is a deficient number, since it is larger than the sum of its proper divisors (1).

118915231 is an equidigital number, since it uses as much as digits as its factorization.

118915231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 31.

The square root of 118915231 is about 10904.8260417120. The cubic root of 118915231 is about 491.7516524291.

The spelling of 118915231 in words is "one hundred eighteen million, nine hundred fifteen thousand, two hundred thirty-one".