216432555 has 8 divisors (see below), whose sum is σ = 346292112. Its totient is φ = 115430688.

The previous prime is 216432529. The next prime is 216432571. The reversal of 216432555 is 555234612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216432555 - 2⁸ = 216432299 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7214404 + ... + 7214433.

It is an arithmetic number, because the mean of its divisors is an integer number (43286514).

Almost surely, 2^216432555 is an apocalyptic number.

216432555 is a deficient number, since it is larger than the sum of its proper divisors (129859557).

216432555 is a wasteful number, since it uses less digits than its factorization.

216432555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14428845.

The product of its digits is 36000, while the sum is 33.

The square root of 216432555 is about 14711.6469166440. The cubic root of 216432555 is about 600.4002468336.

The spelling of 216432555 in words is "two hundred sixteen million, four hundred thirty-two thousand, five hundred fifty-five".