216718264 has 32 divisors (see below), whose sum is σ = 465667200. Its totient is φ = 92625120.

The previous prime is 216718231. The next prime is 216718277. The reversal of 216718264 is 462817612.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 16119 + ... + 26329.

It is an arithmetic number, because the mean of its divisors is an integer number (14552100).

Almost surely, 2^216718264 is an apocalyptic number.

It is an amenable number.

216718264 is an abundant number, since it is smaller than the sum of its proper divisors (248948936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216718264 is a wasteful number, since it uses less digits than its factorization.

216718264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10603 (or 10599 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 216718264 is about 14721.3540138127. The cubic root of 216718264 is about 600.6643234451.

The spelling of 216718264 in words is "two hundred sixteen million, seven hundred eighteen thousand, two hundred sixty-four".