118522161 has 6 divisors (see below), whose sum is σ = 171198690. Its totient is φ = 79014768.

The previous prime is 118522139. The next prime is 118522169. The reversal of 118522161 is 161225811.

It can be written as a sum of positive squares in only one way, i.e., 93721761 + 24800400 = 9681^2 + 4980^2 .

It is not a de Polignac number, because 118522161 - 2⁶ = 118522097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118522169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6584556 + ... + 6584573.

It is an arithmetic number, because the mean of its divisors is an integer number (28533115).

Almost surely, 2^118522161 is an apocalyptic number.

It is an amenable number.

118522161 is a deficient number, since it is larger than the sum of its proper divisors (52676529).

118522161 is a wasteful number, since it uses less digits than its factorization.

118522161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13169135 (or 13169132 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 118522161 is about 10886.7883693953. The cubic root of 118522161 is about 491.2092318984.

Adding to 118522161 its reverse (161225811), we get a palindrome (279747972).

The spelling of 118522161 in words is "one hundred eighteen million, five hundred twenty-two thousand, one hundred sixty-one".