216343255 has 16 divisors (see below), whose sum is σ = 267509664. Its totient is φ = 167840640.

The previous prime is 216343249. The next prime is 216343261. The reversal of 216343255 is 552343612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216343249) and next prime (216343261).

It is not a de Polignac number, because 216343255 - 2⁵ = 216343223 is a prime.

It is a Duffinian number.

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, 59469 + ... + 63001.

It is an arithmetic number, because the mean of its divisors is an integer number (16719354).

Almost surely, 2^216343255 is an apocalyptic number.

216343255 is a deficient number, since it is larger than the sum of its proper divisors (51166409).

216343255 is a wasteful number, since it uses less digits than its factorization.

216343255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906.

The product of its digits is 21600, while the sum is 31.

The square root of 216343255 is about 14708.6115932130. The cubic root of 216343255 is about 600.3176604937.

Adding to 216343255 its reverse (552343612), we get a palindrome (768686867).

The spelling of 216343255 in words is "two hundred sixteen million, three hundred forty-three thousand, two hundred fifty-five".