216550366 has 32 divisors (see below), whose sum is σ = 345602880. Its totient is φ = 101606400.

The previous prime is 216550357. The next prime is 216550379. The reversal of 216550366 is 663055612.

It is a super-2 number, since 2×216550366² = 93788122029467912, which contains 22 as substring.

It is a congruent number.

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, 342871 + ... + 343501.

It is an arithmetic number, because the mean of its divisors is an integer number (10800090).

Almost surely, 2^216550366 is an apocalyptic number.

216550366 is a deficient number, since it is larger than the sum of its proper divisors (129052514).

216550366 is a wasteful number, since it uses less digits than its factorization.

216550366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 216550366 is about 14715.6503763850. The cubic root of 216550366 is about 600.5091659427.

The spelling of 216550366 in words is "two hundred sixteen million, five hundred fifty thousand, three hundred sixty-six".