216803441 has 4 divisors (see below), whose sum is σ = 216835584. Its totient is φ = 216771300.

The previous prime is 216803437. The next prime is 216803453. The reversal of 216803441 is 144308612.

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 216803441 - 2² = 216803437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216803141) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1625 + ... + 20886.

It is an arithmetic number, because the mean of its divisors is an integer number (54208896).

Almost surely, 2^216803441 is an apocalyptic number.

It is an amenable number.

216803441 is a deficient number, since it is larger than the sum of its proper divisors (32143).

216803441 is an equidigital number, since it uses as much as digits as its factorization.

216803441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32142.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 216803441 is about 14724.2467039913. The cubic root of 216803441 is about 600.7430063746.

The spelling of 216803441 in words is "two hundred sixteen million, eight hundred three thousand, four hundred forty-one".