16221163 has 8 divisors (see below), whose sum is σ = 18565632. Its totient is φ = 13883496.

The previous prime is 16221151. The next prime is 16221197. The reversal of 16221163 is 36112261.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16221163 is a prime.

It is a super-2 number, since 2×16221163² = 526252258145138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16221103) 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, 5406 + ... + 7852.

It is an arithmetic number, because the mean of its divisors is an integer number (2320704).

Almost surely, 2^16221163 is an apocalyptic number.

16221163 is a deficient number, since it is larger than the sum of its proper divisors (2344469).

16221163 is an equidigital number, since it uses as much as digits as its factorization.

16221163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401.

The product of its digits is 432, while the sum is 22.

The square root of 16221163 is about 4027.5504962694. The cubic root of 16221163 is about 253.1399341491.

It can be divided in two parts, 16221 and 163, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 16221163 in words is "sixteen million, two hundred twenty-one thousand, one hundred sixty-three".