118087231 has 2 divisors, whose sum is σ = 118087232. Its totient is φ = 118087230.

The previous prime is 118087213. The next prime is 118087237. The reversal of 118087231 is 132780811.

It is a happy number.

Together with previous prime (118087213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 118087231 - 2⁷ = 118087103 is a prime.

It is a super-2 number, since 2×118087231² = 27889188250494722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 118087193 and 118087202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118087237) 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 as a sum of consecutive naturals, namely, 59043615 + 59043616.

It is an arithmetic number, because the mean of its divisors is an integer number (59043616).

Almost surely, 2^118087231 is an apocalyptic number.

118087231 is a deficient number, since it is larger than the sum of its proper divisors (1).

118087231 is an equidigital number, since it uses as much as digits as its factorization.

118087231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 118087231 is about 10866.7948816567. The cubic root of 118087231 is about 490.6076468148.

The spelling of 118087231 in words is "one hundred eighteen million, eighty-seven thousand, two hundred thirty-one".