219118990 has 16 divisors (see below), whose sum is σ = 399818448. Its totient is φ = 86446656.

The previous prime is 219118981. The next prime is 219118997. The reversal of 219118990 is 99811912.

219118990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219118997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149352 + ... + 150811.

It is an arithmetic number, because the mean of its divisors is an integer number (24988653).

Almost surely, 2^219118990 is an apocalyptic number.

219118990 is a deficient number, since it is larger than the sum of its proper divisors (180699458).

219118990 is a wasteful number, since it uses less digits than its factorization.

219118990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300243.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 219118990 is about 14802.6683405391. The cubic root of 219118990 is about 602.8741636913.

The spelling of 219118990 in words is "two hundred nineteen million, one hundred eighteen thousand, nine hundred ninety".