216443413 has 4 divisors (see below), whose sum is σ = 221048640. Its totient is φ = 211838188.

The previous prime is 216443411. The next prime is 216443417. The reversal of 216443413 is 314344612.

216443413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216443413 - 2¹ = 216443411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216443411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2302543 + ... + 2302636.

It is an arithmetic number, because the mean of its divisors is an integer number (55262160).

Almost surely, 2^216443413 is an apocalyptic number.

It is an amenable number.

216443413 is a deficient number, since it is larger than the sum of its proper divisors (4605227).

216443413 is an equidigital number, since it uses as much as digits as its factorization.

216443413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605226.

The product of its digits is 6912, while the sum is 28.

The square root of 216443413 is about 14712.0159393606. The cubic root of 216443413 is about 600.4102869696.

The spelling of 216443413 in words is "two hundred sixteen million, four hundred forty-three thousand, four hundred thirteen".