118118551 has 2 divisors, whose sum is σ = 118118552. Its totient is φ = 118118550.

The previous prime is 118118491. The next prime is 118118579. The reversal of 118118551 is 155811811.

It is a strong prime.

It is an emirp because it is prime and its reverse (155811811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118118551 - 2¹¹ = 118116503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118118051) 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, 59059275 + 59059276.

It is an arithmetic number, because the mean of its divisors is an integer number (59059276).

Almost surely, 2^118118551 is an apocalyptic number.

118118551 is a deficient number, since it is larger than the sum of its proper divisors (1).

118118551 is an equidigital number, since it uses as much as digits as its factorization.

118118551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 31.

The square root of 118118551 is about 10868.2358734065. The cubic root of 118118551 is about 490.6510172201.

The spelling of 118118551 in words is "one hundred eighteen million, one hundred eighteen thousand, five hundred fifty-one".