216446047 has 4 divisors (see below), whose sum is σ = 221479720. Its totient is φ = 211412376.

The previous prime is 216446039. The next prime is 216446051. The reversal of 216446047 is 740644612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216446047 - 2³ = 216446039 is a prime.

It is a super-4 number, since 4×216446047⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216446147) 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 3 ways as a sum of consecutive naturals, for example, 2516772 + ... + 2516857.

It is an arithmetic number, because the mean of its divisors is an integer number (55369930).

Almost surely, 2^216446047 is an apocalyptic number.

216446047 is a deficient number, since it is larger than the sum of its proper divisors (5033673).

216446047 is an equidigital number, since it uses as much as digits as its factorization.

216446047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033672.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 216446047 is about 14712.1054577514. The cubic root of 216446047 is about 600.4127225166.

The spelling of 216446047 in words is "two hundred sixteen million, four hundred forty-six thousand, forty-seven".