17228561 has 4 divisors (see below), whose sum is σ = 19689792. Its totient is φ = 14767332.

The previous prime is 17228543. The next prime is 17228597. The reversal of 17228561 is 16582271.

17228561 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17228561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17228521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1230605 + ... + 1230618.

It is an arithmetic number, because the mean of its divisors is an integer number (4922448).

Almost surely, 2^17228561 is an apocalyptic number.

It is an amenable number.

17228561 is a deficient number, since it is larger than the sum of its proper divisors (2461231).

17228561 is an equidigital number, since it uses as much as digits as its factorization.

17228561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461230.

The product of its digits is 6720, while the sum is 32.

The square root of 17228561 is about 4150.7301767279. The cubic root of 17228561 is about 258.2753755053.

The spelling of 17228561 in words is "seventeen million, two hundred twenty-eight thousand, five hundred sixty-one".