216413017 has 4 divisors (see below), whose sum is σ = 216444580. Its totient is φ = 216381456.

The previous prime is 216413011. The next prime is 216413027. The reversal of 216413017 is 710314612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 34999056 + 181413961 = 5916^2 + 13469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216413017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216412982 and 216413000.

It is not an unprimeable number, because it can be changed into a prime (216413011) 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, 678 + ... + 20815.

It is an arithmetic number, because the mean of its divisors is an integer number (54111145).

Almost surely, 2^216413017 is an apocalyptic number.

It is an amenable number.

216413017 is a deficient number, since it is larger than the sum of its proper divisors (31563).

216413017 is a wasteful number, since it uses less digits than its factorization.

216413017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31562.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 216413017 is about 14710.9828699513. The cubic root of 216413017 is about 600.3821796610.

Adding to 216413017 its reverse (710314612), we get a palindrome (926727629).

The spelling of 216413017 in words is "two hundred sixteen million, four hundred thirteen thousand, seventeen".