216022554 has 24 divisors (see below), whose sum is σ = 510599232. Its totient is φ = 65461320.

The previous prime is 216022531. The next prime is 216022561. The reversal of 216022554 is 455220612.

216022554 is a `hidden beast` number, since 2 + 1 + 602 + 2 + 5 + 54 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 545314 + ... + 545709.

It is an arithmetic number, because the mean of its divisors is an integer number (21274968).

Almost surely, 2^216022554 is an apocalyptic number.

216022554 is an abundant number, since it is smaller than the sum of its proper divisors (294576678).

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

216022554 is a wasteful number, since it uses less digits than its factorization.

216022554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091042 (or 1091039 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 216022554 is about 14697.7057393322. The cubic root of 216022554 is about 600.0208826065.

The spelling of 216022554 in words is "two hundred sixteen million, twenty-two thousand, five hundred fifty-four".