16332217 has 18 divisors (see below), whose sum is σ = 18630906. Its totient is φ = 14303520.

The previous prime is 16332209. The next prime is 16332241. The reversal of 16332217 is 71223361.

It can be written as a sum of positive squares in only one way, i.e., 14318656 + 2013561 = 3784^2 + 1419^2 .

It is not a de Polignac number, because 16332217 - 2³ = 16332209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16332191 and 16332200.

It is not an unprimeable number, because it can be changed into a prime (16332287) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 223693 + ... + 223765.

Almost surely, 2^16332217 is an apocalyptic number.

It is an amenable number.

16332217 is a deficient number, since it is larger than the sum of its proper divisors (2298689).

16332217 is an equidigital number, since it uses as much as digits as its factorization.

16332217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 127 counting only the distinct ones).

The product of its digits is 1512, while the sum is 25.

The square root of 16332217 is about 4041.3137715352. The cubic root of 16332217 is about 253.7163065263.

Adding to 16332217 its reverse (71223361), we get a palindrome (87555578).

It can be divided in two parts, 16 and 332217, that added together give a palindrome (332233).

The spelling of 16332217 in words is "sixteen million, three hundred thirty-two thousand, two hundred seventeen".