17220247 has 8 divisors (see below), whose sum is σ = 18896400. Its totient is φ = 15562560.

The previous prime is 17220241. The next prime is 17220299. The reversal of 17220247 is 74202271.

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 17220247 - 2¹⁵ = 17187479 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 (17220241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2622 + ... + 6427.

It is an arithmetic number, because the mean of its divisors is an integer number (2362050).

Almost surely, 2^17220247 is an apocalyptic number.

17220247 is a deficient number, since it is larger than the sum of its proper divisors (1676153).

17220247 is a wasteful number, since it uses less digits than its factorization.

17220247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9233.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 17220247 is about 4149.7285453388. The cubic root of 17220247 is about 258.2338234381.

The spelling of 17220247 in words is "seventeen million, two hundred twenty thousand, two hundred forty-seven".