216650290 has 16 divisors (see below), whose sum is σ = 390693312. Its totient is φ = 86499504.

The previous prime is 216650249. The next prime is 216650299. The reversal of 216650290 is 92056612.

216650290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216650299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14334 + ... + 25273.

It is an arithmetic number, because the mean of its divisors is an integer number (24418332).

Almost surely, 2^216650290 is an apocalyptic number.

216650290 is a deficient number, since it is larger than the sum of its proper divisors (174043022).

216650290 is a wasteful number, since it uses less digits than its factorization.

216650290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40161.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 216650290 is about 14719.0451456608. The cubic root of 216650290 is about 600.6015171308.

The spelling of 216650290 in words is "two hundred sixteen million, six hundred fifty thousand, two hundred ninety".