22525565 has 4 divisors (see below), whose sum is σ = 27030684. Its totient is φ = 18020448.

The previous prime is 22525553. The next prime is 22525567. The reversal of 22525565 is 56552522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2553604 + 19971961 = 1598^2 + 4469^2 .

It is a cyclic number.

It is not a de Polignac number, because 22525565 - 2¹⁴ = 22509181 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 (22525567) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2252552 + ... + 2252561.

It is an arithmetic number, because the mean of its divisors is an integer number (6757671).

Almost surely, 2^22525565 is an apocalyptic number.

It is an amenable number.

22525565 is a deficient number, since it is larger than the sum of its proper divisors (4505119).

22525565 is an equidigital number, since it uses as much as digits as its factorization.

22525565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505118.

The product of its digits is 30000, while the sum is 32.

The square root of 22525565 is about 4746.1105128305. The cubic root of 22525565 is about 282.4176907987.

The spelling of 22525565 in words is "twenty-two million, five hundred twenty-five thousand, five hundred sixty-five".