216833005 has 4 divisors (see below), whose sum is σ = 260199612. Its totient is φ = 173466400.

The previous prime is 216832999. The next prime is 216833009. The reversal of 216833005 is 500338612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138227049 + 78605956 = 11757^2 + 8866^2 .

It is not a de Polignac number, because 216833005 - 2¹⁹ = 216308717 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 (216833009) 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, 21683296 + ... + 21683305.

It is an arithmetic number, because the mean of its divisors is an integer number (65049903).

Almost surely, 2^216833005 is an apocalyptic number.

It is an amenable number.

216833005 is a deficient number, since it is larger than the sum of its proper divisors (43366607).

216833005 is an equidigital number, since it uses as much as digits as its factorization.

216833005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43366606.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 216833005 is about 14725.2505920952. The cubic root of 216833005 is about 600.7703115363.

The spelling of 216833005 in words is "two hundred sixteen million, eight hundred thirty-three thousand, five".