217207083 has 4 divisors (see below), whose sum is σ = 289609448. Its totient is φ = 144804720.

The previous prime is 217207063. The next prime is 217207127. The reversal of 217207083 is 380702712.

217207083 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.

It is not a de Polignac number, because 217207083 - 2⁵ = 217207051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 217207083.

It is not an unprimeable number, because it can be changed into a prime (217207033) 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, 36201178 + ... + 36201183.

It is an arithmetic number, because the mean of its divisors is an integer number (72402362).

Almost surely, 2^217207083 is an apocalyptic number.

217207083 is a deficient number, since it is larger than the sum of its proper divisors (72402365).

217207083 is an equidigital number, since it uses as much as digits as its factorization.

217207083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72402364.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 217207083 is about 14737.9470415659. The cubic root of 217207083 is about 601.1155939093.

Adding to 217207083 its reverse (380702712), we get a palindrome (597909795).

The spelling of 217207083 in words is "two hundred seventeen million, two hundred seven thousand, eighty-three".