216496556 has 12 divisors (see below), whose sum is σ = 379255968. Its totient is φ = 108137712.

The previous prime is 216496487. The next prime is 216496601. The reversal of 216496556 is 655694612.

216496556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216496556² = 93741517519722272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23156 + ... + 31131.

It is an arithmetic number, because the mean of its divisors is an integer number (31604664).

Almost surely, 2^216496556 is an apocalyptic number.

It is an amenable number.

216496556 is a deficient number, since it is larger than the sum of its proper divisors (162759412).

216496556 is a wasteful number, since it uses less digits than its factorization.

216496556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55288 (or 55286 counting only the distinct ones).

The product of its digits is 388800, while the sum is 44.

The square root of 216496556 is about 14713.8219372126. The cubic root of 216496556 is about 600.4594222030.

The spelling of 216496556 in words is "two hundred sixteen million, four hundred ninety-six thousand, five hundred fifty-six".