2217319561 has 16 divisors (see below), whose sum is σ = 2283925248. Its totient is φ = 2151878400.

The previous prime is 2217319541. The next prime is 2217319579. The reversal of 2217319561 is 1659137122.

It is a cyclic number.

It is not a de Polignac number, because 2217319561 - 2¹⁵ = 2217286793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2217319561.

It is not an unprimeable number, because it can be changed into a prime (2217319541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1867410 + ... + 1868596.

It is an arithmetic number, because the mean of its divisors is an integer number (142745328).

Almost surely, 2^2217319561 is an apocalyptic number.

It is an amenable number.

2217319561 is a deficient number, since it is larger than the sum of its proper divisors (66605687).

2217319561 is a wasteful number, since it uses less digits than its factorization.

2217319561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632.

The product of its digits is 22680, while the sum is 37.

The square root of 2217319561 is about 47088.4227915950. The cubic root of 2217319561 is about 1303.9955102989.

The spelling of 2217319561 in words is "two billion, two hundred seventeen million, three hundred nineteen thousand, five hundred sixty-one".