118221885 has 24 divisors (see below), whose sum is σ = 205203960. Its totient is φ = 62963712.

The previous prime is 118221881. The next prime is 118221907. The reversal of 118221885 is 588122811.

It can be written as a sum of positive squares in 4 ways, for example, as 9603801 + 108618084 = 3099^2 + 10422^2 .

It is not a de Polignac number, because 118221885 - 2² = 118221881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118221881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42621 + ... + 45309.

It is an arithmetic number, because the mean of its divisors is an integer number (8550165).

Almost surely, 2^118221885 is an apocalyptic number.

118221885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

118221885 is a deficient number, since it is larger than the sum of its proper divisors (86982075).

118221885 is a wasteful number, since it uses less digits than its factorization.

118221885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677 (or 3674 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 118221885 is about 10872.9887795399. The cubic root of 118221885 is about 490.7940547419.

The spelling of 118221885 in words is "one hundred eighteen million, two hundred twenty-one thousand, eight hundred eighty-five".