216204450 has 96 divisors (see below), whose sum is σ = 668528640. Its totient is φ = 44923200.

The previous prime is 216204449. The next prime is 216204467. The reversal of 216204450 is 54402612.

It is a self number, because there is not a number n which added to its sum of digits gives 216204450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2191 + ... + 20909.

It is an arithmetic number, because the mean of its divisors is an integer number (6963840).

Almost surely, 2^216204450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216204450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334264320).

216204450 is an abundant number, since it is smaller than the sum of its proper divisors (452324190).

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

216204450 is a wasteful number, since it uses less digits than its factorization.

216204450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18752 (or 18747 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 216204450 is about 14703.8923418257. The cubic root of 216204450 is about 600.1892458593.

The spelling of 216204450 in words is "two hundred sixteen million, two hundred four thousand, four hundred fifty".