216082517 has 4 divisors (see below), whose sum is σ = 246951456. Its totient is φ = 185213580.

The previous prime is 216082513. The next prime is 216082523. The reversal of 216082517 is 715280612.

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 216082517 - 2² = 216082513 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 (216082511) 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, 15434459 + ... + 15434472.

It is an arithmetic number, because the mean of its divisors is an integer number (61737864).

Almost surely, 2^216082517 is an apocalyptic number.

It is an amenable number.

216082517 is a deficient number, since it is larger than the sum of its proper divisors (30868939).

216082517 is an equidigital number, since it uses as much as digits as its factorization.

216082517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30868938.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 216082517 is about 14699.7454739870. The cubic root of 216082517 is about 600.0763949022.

The spelling of 216082517 in words is "two hundred sixteen million, eighty-two thousand, five hundred seventeen".