216552843 has 24 divisors (see below), whose sum is σ = 351510432. Its totient is φ = 127467648.

The previous prime is 216552839. The next prime is 216552863. The reversal of 216552843 is 348255612.

216552843 is a `hidden beast` number, since 21 + 6 + 552 + 84 + 3 = 666.

216552843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216552843 - 2² = 216552839 is a prime.

It is a super-2 number, since 2×216552843² = 93790267622765298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216552798 and 216552807.

It is not an unprimeable number, because it can be changed into a prime (216552863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37546 + ... + 42927.

It is an arithmetic number, because the mean of its divisors is an integer number (14646268).

Almost surely, 2^216552843 is an apocalyptic number.

216552843 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

216552843 is a deficient number, since it is larger than the sum of its proper divisors (134957589).

216552843 is a wasteful number, since it uses less digits than its factorization.

216552843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80515 (or 80512 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 216552843 is about 14715.7345382417. The cubic root of 216552843 is about 600.5114555648.

The spelling of 216552843 in words is "two hundred sixteen million, five hundred fifty-two thousand, eight hundred forty-three".