118221849 has 20 divisors (see below), whose sum is σ = 177114960. Its totient is φ = 78586200.

The previous prime is 118221811. The next prime is 118221871. The reversal of 118221849 is 948122811.

It is a happy number.

It is not a de Polignac number, because 118221849 - 2¹⁹ = 117697561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118221809) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28774 + ... + 32624.

It is an arithmetic number, because the mean of its divisors is an integer number (8855748).

Almost surely, 2^118221849 is an apocalyptic number.

It is an amenable number.

118221849 is a deficient number, since it is larger than the sum of its proper divisors (58893111).

118221849 is an equidigital number, since it uses as much as digits as its factorization.

118221849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242 (or 4233 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 118221849 is about 10872.9871240612. The cubic root of 118221849 is about 490.7940049243.

The spelling of 118221849 in words is "one hundred eighteen million, two hundred twenty-one thousand, eight hundred forty-nine".