118366181 has 4 divisors (see below), whose sum is σ = 124596000. Its totient is φ = 112136364.

The previous prime is 118366151. The next prime is 118366201. The reversal of 118366181 is 181663811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 118366181 - 2⁶ = 118366117 is a prime.

It is a super-2 number, since 2×118366181² = 28021105609049522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118366111) 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, 3114881 + ... + 3114918.

It is an arithmetic number, because the mean of its divisors is an integer number (31149000).

Almost surely, 2^118366181 is an apocalyptic number.

It is an amenable number.

118366181 is a deficient number, since it is larger than the sum of its proper divisors (6229819).

118366181 is an equidigital number, since it uses as much as digits as its factorization.

118366181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6229818.

The product of its digits is 6912, while the sum is 35.

The square root of 118366181 is about 10879.6222820464. The cubic root of 118366181 is about 490.9936535033.

The spelling of 118366181 in words is "one hundred eighteen million, three hundred sixty-six thousand, one hundred eighty-one".