216366155 has 16 divisors (see below), whose sum is σ = 262747584. Its totient is φ = 171033600.

The previous prime is 216366127. The next prime is 216366169. The reversal of 216366155 is 551663612.

It is not a de Polignac number, because 216366155 - 2¹⁰ = 216365131 is a prime.

It is a Duffinian 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, 179555 + ... + 180755.

It is an arithmetic number, because the mean of its divisors is an integer number (16421724).

Almost surely, 2^216366155 is an apocalyptic number.

216366155 is a deficient number, since it is larger than the sum of its proper divisors (46381429).

216366155 is a wasteful number, since it uses less digits than its factorization.

216366155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606.

The product of its digits is 32400, while the sum is 35.

The square root of 216366155 is about 14709.3900281419. The cubic root of 216366155 is about 600.3388410160.

The spelling of 216366155 in words is "two hundred sixteen million, three hundred sixty-six thousand, one hundred fifty-five".