17220161 has 8 divisors (see below), whose sum is σ = 19706304. Its totient is φ = 14740560.

The previous prime is 17220157. The next prime is 17220187. The reversal of 17220161 is 16102271.

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 17220161 - 2² = 17220157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17220101) 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, 7226 + ... + 9308.

It is an arithmetic number, because the mean of its divisors is an integer number (2463288).

Almost surely, 2^17220161 is an apocalyptic number.

It is an amenable number.

17220161 is a deficient number, since it is larger than the sum of its proper divisors (2486143).

17220161 is a wasteful number, since it uses less digits than its factorization.

17220161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 17220161 is about 4149.7181832023. The cubic root of 17220161 is about 258.2333935537.

The spelling of 17220161 in words is "seventeen million, two hundred twenty thousand, one hundred sixty-one".