216244505 has 32 divisors (see below), whose sum is σ = 292253184. Its totient is φ = 152728576.

The previous prime is 216244493. The next prime is 216244517. The reversal of 216244505 is 505442612.

It is an interprime number because it is at equal distance from previous prime (216244493) and next prime (216244517).

It is a cyclic number.

It is not a de Polignac number, because 216244505 - 2⁴ = 216244489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102572 + ... + 104658.

It is an arithmetic number, because the mean of its divisors is an integer number (9132912).

Almost surely, 2^216244505 is an apocalyptic number.

It is an amenable number.

216244505 is a deficient number, since it is larger than the sum of its proper divisors (76008679).

216244505 is a wasteful number, since it uses less digits than its factorization.

216244505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185.

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

The square root of 216244505 is about 14705.2543330607. The cubic root of 216244505 is about 600.2263081488.

The spelling of 216244505 in words is "two hundred sixteen million, two hundred forty-four thousand, five hundred five".