2221565607 has 24 divisors (see below), whose sum is σ = 3430129248. Its totient is φ = 1382092800.

The previous prime is 2221565603. The next prime is 2221565639. The reversal of 2221565607 is 7065651222.

2221565607 is a `hidden beast` number, since 22 + 21 + 5 + 6 + 5 + 607 = 666.

It is not a de Polignac number, because 2221565607 - 2² = 2221565603 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 23 ways as a sum of consecutive naturals, for example, 122394 + ... + 139367.

It is an arithmetic number, because the mean of its divisors is an integer number (142922052).

Almost surely, 2^2221565607 is an apocalyptic number.

2221565607 is a deficient number, since it is larger than the sum of its proper divisors (1208563641).

2221565607 is a wasteful number, since it uses less digits than its factorization.

2221565607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261831 (or 261828 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 2221565607 is about 47133.4871084243. The cubic root of 2221565607 is about 1304.8273396442.

The spelling of 2221565607 in words is "two billion, two hundred twenty-one million, five hundred sixty-five thousand, six hundred seven".