116515181 has 2 divisors, whose sum is σ = 116515182. Its totient is φ = 116515180.

The previous prime is 116515177. The next prime is 116515187. The reversal of 116515181 is 181515611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72505225 + 44009956 = 8515^2 + 6634^2 .

It is a cyclic number.

It is not a de Polignac number, because 116515181 - 2² = 116515177 is a prime.

It is a super-2 number, since 2×116515181² = 27151574806925522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116515187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58257590 + 58257591.

It is an arithmetic number, because the mean of its divisors is an integer number (58257591).

Almost surely, 2^116515181 is an apocalyptic number.

It is an amenable number.

116515181 is a deficient number, since it is larger than the sum of its proper divisors (1).

116515181 is an equidigital number, since it uses as much as digits as its factorization.

116515181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 29.

The square root of 116515181 is about 10794.2197957981. The cubic root of 116515181 is about 488.4208233427.

The spelling of 116515181 in words is "one hundred sixteen million, five hundred fifteen thousand, one hundred eighty-one".