216244655 has 8 divisors (see below), whose sum is σ = 283083984. Its totient is φ = 157268800.

The previous prime is 216244621. The next prime is 216244657. The reversal of 216244655 is 556442612.

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

It is not a de Polignac number, because 216244655 - 2⁶ = 216244591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216244657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1965806 + ... + 1965915.

It is an arithmetic number, because the mean of its divisors is an integer number (35385498).

Almost surely, 2^216244655 is an apocalyptic number.

216244655 is a deficient number, since it is larger than the sum of its proper divisors (66839329).

216244655 is a wasteful number, since it uses less digits than its factorization.

216244655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931737.

The product of its digits is 57600, while the sum is 35.

The square root of 216244655 is about 14705.2594332776. The cubic root of 216244655 is about 600.2264469330.

The spelling of 216244655 in words is "two hundred sixteen million, two hundred forty-four thousand, six hundred fifty-five".