216264459 has 8 divisors (see below), whose sum is σ = 293079952. Its totient is φ = 141812640.

The previous prime is 216264449. The next prime is 216264473. The reversal of 216264459 is 954462612.

It is a happy number.

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

It is not a de Polignac number, because 216264459 - 2⁴ = 216264443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216264439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590704 + ... + 591069.

It is an arithmetic number, because the mean of its divisors is an integer number (36634994).

Almost surely, 2^216264459 is an apocalyptic number.

216264459 is a deficient number, since it is larger than the sum of its proper divisors (76815493).

216264459 is a wasteful number, since it uses less digits than its factorization.

216264459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181837.

The product of its digits is 103680, while the sum is 39.

The square root of 216264459 is about 14705.9327823841. The cubic root of 216264459 is about 600.2447695773.

The spelling of 216264459 in words is "two hundred sixteen million, two hundred sixty-four thousand, four hundred fifty-nine".