216652900 has 18 divisors (see below), whose sum is σ = 470137010. Its totient is φ = 86661120.

The previous prime is 216652889. The next prime is 216652903. The reversal of 216652900 is 9256612.

It can be written as a sum of positive squares in 3 ways, for example, as 16826404 + 199826496 = 4102^2 + 14136^2 .

It is not an unprimeable number, because it can be changed into a prime (216652903) 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, 1083165 + ... + 1083364.

Almost surely, 2^216652900 is an apocalyptic number.

216652900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216652900 is an abundant number, since it is smaller than the sum of its proper divisors (253484110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216652900 is a wasteful number, since it uses less digits than its factorization.

216652900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166543 (or 2166536 counting only the distinct ones).

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

The square root of 216652900 is about 14719.1338060363. The cubic root of 216652900 is about 600.6039289495.

The spelling of 216652900 in words is "two hundred sixteen million, six hundred fifty-two thousand, nine hundred".