16220161 has 8 divisors (see below), whose sum is σ = 16934400. Its totient is φ = 15517920.

The previous prime is 16220143. The next prime is 16220177. The reversal of 16220161 is 16102261.

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 16220161 - 2²¹ = 14123009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16220101) 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, 181 + ... + 5698.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

It is a Proth number, since it is equal to 495 ⋅ 2¹⁵ + 1 and 495 < 2¹⁵.

Almost surely, 2^16220161 is an apocalyptic number.

It is an amenable number.

16220161 is a deficient number, since it is larger than the sum of its proper divisors (714239).

16220161 is an equidigital number, since it uses as much as digits as its factorization.

16220161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 16220161 is about 4027.4261011222. The cubic root of 16220161 is about 253.1347217929.

The spelling of 16220161 in words is "sixteen million, two hundred twenty thousand, one hundred sixty-one".