216222455 has 8 divisors (see below), whose sum is σ = 260772000. Its totient is φ = 172107936.

The previous prime is 216222437. The next prime is 216222511. The reversal of 216222455 is 554222612.

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

It is not a de Polignac number, because 216222455 - 2¹⁰ = 216221431 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 107660 + ... + 109649.

It is an arithmetic number, because the mean of its divisors is an integer number (32596500).

Almost surely, 2^216222455 is an apocalyptic number.

216222455 is a deficient number, since it is larger than the sum of its proper divisors (44549545).

216222455 is a wasteful number, since it uses less digits than its factorization.

216222455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217513.

The product of its digits is 9600, while the sum is 29.

The square root of 216222455 is about 14704.5045819300. The cubic root of 216222455 is about 600.2059061815.

The spelling of 216222455 in words is "two hundred sixteen million, two hundred twenty-two thousand, four hundred fifty-five".