216455443 has 4 divisors (see below), whose sum is σ = 216590760. Its totient is φ = 216320128.

The previous prime is 216455431. The next prime is 216455453. The reversal of 216455443 is 344554612.

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 216455443 - 2⁵ = 216455411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216455399 and 216455408.

It is not an unprimeable number, because it can be changed into a prime (216455413) 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, 65230 + ... + 68467.

It is an arithmetic number, because the mean of its divisors is an integer number (54147690).

Almost surely, 2^216455443 is an apocalyptic number.

216455443 is a deficient number, since it is larger than the sum of its proper divisors (135317).

216455443 is a wasteful number, since it uses less digits than its factorization.

216455443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135316.

The product of its digits is 57600, while the sum is 34.

The square root of 216455443 is about 14712.4247831552. The cubic root of 216455443 is about 600.4214104343.

The spelling of 216455443 in words is "two hundred sixteen million, four hundred fifty-five thousand, four hundred forty-three".