216850554 has 32 divisors (see below), whose sum is σ = 484410240. Its totient is φ = 71905536.

The previous prime is 216850523. The next prime is 216850567. The reversal of 216850554 is 455058612.

216850554 is a `hidden beast` number, since 21 + 6 + 85 + 0 + 554 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19 + ... + 20825.

It is an arithmetic number, because the mean of its divisors is an integer number (15137820).

Almost surely, 2^216850554 is an apocalyptic number.

216850554 is an abundant number, since it is smaller than the sum of its proper divisors (267559686).

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

216850554 is a wasteful number, since it uses less digits than its factorization.

216850554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21011 (or 21005 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 216850554 is about 14725.8464612395. The cubic root of 216850554 is about 600.7865185305.

The spelling of 216850554 in words is "two hundred sixteen million, eight hundred fifty thousand, five hundred fifty-four".