17220005 has 16 divisors (see below), whose sum is σ = 22883904. Its totient is φ = 12334080.

The previous prime is 17219989. The next prime is 17220011. The reversal of 17220005 is 50002271.

17220005 = T₂₆₂₂ + T₂₆₂₃ + ... + T₂₆₂₆.

It is not a de Polignac number, because 17220005 - 2⁴ = 17219989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1349 + ... + 6021.

It is an arithmetic number, because the mean of its divisors is an integer number (1430244).

Almost surely, 2^17220005 is an apocalyptic number.

It is an amenable number.

17220005 is a deficient number, since it is larger than the sum of its proper divisors (5663899).

17220005 is a wasteful number, since it uses less digits than its factorization.

17220005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 17220005 is about 4149.6993867026. The cubic root of 17220005 is about 258.2326137598.

Adding to 17220005 its reverse (50002271), we get a palindrome (67222276).

It can be divided in two parts, 17 and 220005, that added together give a palindrome (220022).

The spelling of 17220005 in words is "seventeen million, two hundred twenty thousand, five".