22145745 has 16 divisors (see below), whose sum is σ = 36015552. Its totient is φ = 11616960.

The previous prime is 22145743. The next prime is 22145759. The reversal of 22145745 is 54754122.

It is not a de Polignac number, because 22145745 - 2¹ = 22145743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22145743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11187 + ... + 13016.

It is an arithmetic number, because the mean of its divisors is an integer number (2250972).

Almost surely, 2^22145745 is an apocalyptic number.

It is an amenable number.

22145745 is a deficient number, since it is larger than the sum of its proper divisors (13869807).

22145745 is a wasteful number, since it uses less digits than its factorization.

22145745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24272.

The product of its digits is 11200, while the sum is 30.

The square root of 22145745 is about 4705.9265825127. The cubic root of 22145745 is about 280.8213341434.

Adding to 22145745 its reverse (54754122), we get a palindrome (76899867).

The spelling of 22145745 in words is "twenty-two million, one hundred forty-five thousand, seven hundred forty-five".