216730255 has 16 divisors (see below), whose sum is σ = 302105664. Its totient is φ = 146177280.

The previous prime is 216730249. The next prime is 216730279. The reversal of 216730255 is 552037612.

It is not a de Polignac number, because 216730255 - 2³ = 216730247 is a prime.

It is a congruent 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, 48622 + ... + 52891.

It is an arithmetic number, because the mean of its divisors is an integer number (18881604).

Almost surely, 2^216730255 is an apocalyptic number.

216730255 is a deficient number, since it is larger than the sum of its proper divisors (85375409).

216730255 is a wasteful number, since it uses less digits than its factorization.

216730255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101586.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 216730255 is about 14721.7612737063. The cubic root of 216730255 is about 600.6754014732.

Adding to 216730255 its reverse (552037612), we get a palindrome (768767867).

The spelling of 216730255 in words is "two hundred sixteen million, seven hundred thirty thousand, two hundred fifty-five".