16734221 has 8 divisors (see below), whose sum is σ = 19198080. Its totient is φ = 14288688.

The previous prime is 16734217. The next prime is 16734227. The reversal of 16734221 is 12243761.

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 16734221 - 2² = 16734217 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 (16734227) 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, 2561 + ... + 6326.

It is an arithmetic number, because the mean of its divisors is an integer number (2399760).

Almost surely, 2^16734221 is an apocalyptic number.

It is an amenable number.

16734221 is a deficient number, since it is larger than the sum of its proper divisors (2463859).

16734221 is an equidigital number, since it uses as much as digits as its factorization.

16734221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9163.

The product of its digits is 2016, while the sum is 26.

The square root of 16734221 is about 4090.7482200693. The cubic root of 16734221 is about 255.7811290478.

Adding to 16734221 its reverse (12243761), we get a palindrome (28977982).

The spelling of 16734221 in words is "sixteen million, seven hundred thirty-four thousand, two hundred twenty-one".