118500181 has 2 divisors, whose sum is σ = 118500182. Its totient is φ = 118500180.

The previous prime is 118500101. The next prime is 118500191. The reversal of 118500181 is 181005811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110965156 + 7535025 = 10534^2 + 2745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118500181 is a prime.

It is a super-2 number, since 2×118500181² = 28084585794065522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118500101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59250090 + 59250091.

It is an arithmetic number, because the mean of its divisors is an integer number (59250091).

Almost surely, 2^118500181 is an apocalyptic number.

It is an amenable number.

118500181 is a deficient number, since it is larger than the sum of its proper divisors (1).

118500181 is an equidigital number, since it uses as much as digits as its factorization.

118500181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 25.

The square root of 118500181 is about 10885.7788421408. The cubic root of 118500181 is about 491.1788650136.

Adding to 118500181 its reverse (181005811), we get a palindrome (299505992).

The spelling of 118500181 in words is "one hundred eighteen million, five hundred thousand, one hundred eighty-one".