22427145 has 48 divisors (see below), whose sum is σ = 43217280. Its totient is φ = 11029824.

The previous prime is 22427137. The next prime is 22427161. The reversal of 22427145 is 54172422.

It is not a de Polignac number, because 22427145 - 2³ = 22427137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 22324 + ... + 23306.

It is an arithmetic number, because the mean of its divisors is an integer number (900360).

Almost surely, 2^22427145 is an apocalyptic number.

It is an amenable number.

22427145 is a deficient number, since it is larger than the sum of its proper divisors (20790135).

22427145 is a wasteful number, since it uses less digits than its factorization.

22427145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 1004 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 22427145 is about 4735.7306722406. The cubic root of 22427145 is about 282.0057717243.

Adding to 22427145 its reverse (54172422), we get a palindrome (76599567).

The spelling of 22427145 in words is "twenty-two million, four hundred twenty-seven thousand, one hundred forty-five".