22187227 has 8 divisors (see below), whose sum is σ = 24250752. Its totient is φ = 20208000.

The previous prime is 22187219. The next prime is 22187237. The reversal of 22187227 is 72278122.

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 22187227 - 2³ = 22187219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22187237) 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 7 ways as a sum of consecutive naturals, for example, 20524 + ... + 21577.

It is an arithmetic number, because the mean of its divisors is an integer number (3031344).

Almost surely, 2^22187227 is an apocalyptic number.

22187227 is a deficient number, since it is larger than the sum of its proper divisors (2063525).

22187227 is a wasteful number, since it uses less digits than its factorization.

22187227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42149.

The product of its digits is 6272, while the sum is 31.

The square root of 22187227 is about 4710.3319415939. The cubic root of 22187227 is about 280.9965636624.

The spelling of 22187227 in words is "twenty-two million, one hundred eighty-seven thousand, two hundred twenty-seven".