2221565605 has 16 divisors (see below), whose sum is σ = 3066902784. Its totient is φ = 1513267200.

The previous prime is 2221565603. The next prime is 2221565639. The reversal of 2221565605 is 5065651222.

It is not a de Polignac number, because 2221565605 - 2¹ = 2221565603 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 (2221565603) 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, 204892 + ... + 215461.

It is an arithmetic number, because the mean of its divisors is an integer number (191681424).

Almost surely, 2^2221565605 is an apocalyptic number.

It is an amenable number.

2221565605 is a deficient number, since it is larger than the sum of its proper divisors (845337179).

2221565605 is a wasteful number, since it uses less digits than its factorization.

2221565605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420516.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 2221565605 is about 47133.4870872080. The cubic root of 2221565605 is about 1304.8273392526.

The spelling of 2221565605 in words is "two billion, two hundred twenty-one million, five hundred sixty-five thousand, six hundred five".