16216217 has 8 divisors (see below), whose sum is σ = 16458624. Its totient is φ = 15975648.

The previous prime is 16216163. The next prime is 16216223. The reversal of 16216217 is 71261261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16216217 - 2⁸ = 16215961 is a prime.

It is a super-4 number, since 4×16216217⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16216247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31988 + ... + 32490.

It is an arithmetic number, because the mean of its divisors is an integer number (2057328).

Almost surely, 2^16216217 is an apocalyptic number.

It is an amenable number.

16216217 is a deficient number, since it is larger than the sum of its proper divisors (242407).

16216217 is a wasteful number, since it uses less digits than its factorization.

16216217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919.

The product of its digits is 1008, while the sum is 26.

The square root of 16216217 is about 4026.9364286018. The cubic root of 16216217 is about 253.1142032076.

Adding to 16216217 its reverse (71261261), we get a palindrome (87477478).

The spelling of 16216217 in words is "sixteen million, two hundred sixteen thousand, two hundred seventeen".