22187245 has 8 divisors (see below), whose sum is σ = 27076320. Its totient is φ = 17448720.

The previous prime is 22187239. The next prime is 22187279. The reversal of 22187245 is 54278122.

It is a happy number.

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

It is not a de Polignac number, because 22187245 - 2³ = 22187237 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37311 + ... + 37900.

It is an arithmetic number, because the mean of its divisors is an integer number (3384540).

Almost surely, 2^22187245 is an apocalyptic number.

It is an amenable number.

22187245 is a deficient number, since it is larger than the sum of its proper divisors (4889075).

22187245 is an equidigital number, since it uses as much as digits as its factorization.

22187245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75275.

The product of its digits is 8960, while the sum is 31.

The square root of 22187245 is about 4710.3338522869. Note that the first 3 decimals coincide. The cubic root of 22187245 is about 280.9966396511.

The spelling of 22187245 in words is "twenty-two million, one hundred eighty-seven thousand, two hundred forty-five".