16221169 has 8 divisors (see below), whose sum is σ = 16548480. Its totient is φ = 15896496.

The previous prime is 16221151. The next prime is 16221197. The reversal of 16221169 is 96112261.

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 16221169 - 2⁵ = 16221137 is a prime.

It is a super-2 number, since 2×16221169² = 526252647453122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16221109) 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, 15507 + ... + 16519.

It is an arithmetic number, because the mean of its divisors is an integer number (2068560).

Almost surely, 2^16221169 is an apocalyptic number.

It is an amenable number.

16221169 is a deficient number, since it is larger than the sum of its proper divisors (327311).

16221169 is a wasteful number, since it uses less digits than its factorization.

16221169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319.

The product of its digits is 1296, while the sum is 28.

The square root of 16221169 is about 4027.5512411390. The cubic root of 16221169 is about 253.1399653602.

The spelling of 16221169 in words is "sixteen million, two hundred twenty-one thousand, one hundred sixty-nine".