216442560 has 56 divisors (see below), whose sum is σ = 687208176. Its totient is φ = 57717760.

The previous prime is 216442553. The next prime is 216442609. The reversal of 216442560 is 65244612.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111771 + ... + 113690.

Almost surely, 2^216442560 is an apocalyptic number.

216442560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216442560 is an abundant number, since it is smaller than the sum of its proper divisors (470765616).

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

216442560 is a wasteful number, since it uses less digits than its factorization.

216442560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225481 (or 225471 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 216442560 is about 14711.9869494232. The cubic root of 216442560 is about 600.4094982329.

The spelling of 216442560 in words is "two hundred sixteen million, four hundred forty-two thousand, five hundred sixty".