2221825765 has 8 divisors (see below), whose sum is σ = 2738250360. Its totient is φ = 1729420992.

The previous prime is 2221825733. The next prime is 2221825777. The reversal of 2221825765 is 5675281222.

It can be written as a sum of positive squares in 4 ways, for example, as 662444644 + 1559381121 = 25738^2 + 39489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221825765 - 2⁵ = 2221825733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6004750 + ... + 6005119.

It is an arithmetic number, because the mean of its divisors is an integer number (342281295).

Almost surely, 2^2221825765 is an apocalyptic number.

It is an amenable number.

2221825765 is a deficient number, since it is larger than the sum of its proper divisors (516424595).

2221825765 is a wasteful number, since it uses less digits than its factorization.

2221825765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12009911.

The product of its digits is 134400, while the sum is 40.

The square root of 2221825765 is about 47136.2468276803. The cubic root of 2221825765 is about 1304.8782718967.

The spelling of 2221825765 in words is "two billion, two hundred twenty-one million, eight hundred twenty-five thousand, seven hundred sixty-five".