22528145 has 8 divisors (see below), whose sum is σ = 28624104. Its totient is φ = 16962304.

The previous prime is 22528123. The next prime is 22528169. The reversal of 22528145 is 54182522.

It can be written as a sum of positive squares in 4 ways, for example, as 11723776 + 10804369 = 3424^2 + 3287^2 .

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 22528145 - 2⁸ = 22527889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132434 + ... + 132603.

It is an arithmetic number, because the mean of its divisors is an integer number (3578013).

Almost surely, 2^22528145 is an apocalyptic number.

It is an amenable number.

22528145 is a deficient number, since it is larger than the sum of its proper divisors (6095959).

22528145 is a wasteful number, since it uses less digits than its factorization.

22528145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265059.

The product of its digits is 6400, while the sum is 29.

The square root of 22528145 is about 4746.3823065573. The cubic root of 22528145 is about 282.4284727676.

The spelling of 22528145 in words is "twenty-two million, five hundred twenty-eight thousand, one hundred forty-five".