216535417 has 4 divisors (see below), whose sum is σ = 247469056. Its totient is φ = 185601780.

The previous prime is 216535399. The next prime is 216535471. The reversal of 216535417 is 714535612.

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 not a de Polignac number, because 216535417 - 2⁷ = 216535289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216535117) 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, 15466809 + ... + 15466822.

It is an arithmetic number, because the mean of its divisors is an integer number (61867264).

Almost surely, 2^216535417 is an apocalyptic number.

It is an amenable number.

216535417 is a deficient number, since it is larger than the sum of its proper divisors (30933639).

216535417 is an equidigital number, since it uses as much as digits as its factorization.

216535417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30933638.

The product of its digits is 25200, while the sum is 34.

The square root of 216535417 is about 14715.1424389980. The cubic root of 216535417 is about 600.4953474205.

The spelling of 216535417 in words is "two hundred sixteen million, five hundred thirty-five thousand, four hundred seventeen".