118218141 has 12 divisors (see below), whose sum is σ = 170875068. Its totient is φ = 78758784.

The previous prime is 118218109. The next prime is 118218169. The reversal of 118218141 is 141812811.

It can be written as a sum of positive squares in 2 ways, for example, as 44756100 + 73462041 = 6690^2 + 8571^2 .

It is not a de Polignac number, because 118218141 - 2⁵ = 118218109 is a prime.

It is a super-2 number, since 2×118218141² = 27951057722991762, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118218941) 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 in 11 ways as a sum of consecutive naturals, for example, 13351 + ... + 20363.

It is an arithmetic number, because the mean of its divisors is an integer number (14239589).

Almost surely, 2^118218141 is an apocalyptic number.

It is an amenable number.

118218141 is a deficient number, since it is larger than the sum of its proper divisors (52656927).

118218141 is a wasteful number, since it uses less digits than its factorization.

118218141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8892 (or 8889 counting only the distinct ones).

The product of its digits is 512, while the sum is 27.

The square root of 118218141 is about 10872.8166084047. The cubic root of 118218141 is about 490.7888736585.

The spelling of 118218141 in words is "one hundred eighteen million, two hundred eighteen thousand, one hundred forty-one".