22157227 has 4 divisors (see below), whose sum is σ = 22175856. Its totient is φ = 22138600.

The previous prime is 22157207. The next prime is 22157263. The reversal of 22157227 is 72275122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22157227 - 2¹¹ = 22155179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22157195 and 22157204.

It is not an unprimeable number, because it can be changed into a prime (22157207) 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 3 ways as a sum of consecutive naturals, for example, 7399 + ... + 9952.

It is an arithmetic number, because the mean of its divisors is an integer number (5543964).

Almost surely, 2^22157227 is an apocalyptic number.

22157227 is a deficient number, since it is larger than the sum of its proper divisors (18629).

22157227 is a wasteful number, since it uses less digits than its factorization.

22157227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18628.

The product of its digits is 3920, while the sum is 28.

The square root of 22157227 is about 4707.1463754593. The cubic root of 22157227 is about 280.8698586412.

The spelling of 22157227 in words is "twenty-two million, one hundred fifty-seven thousand, two hundred twenty-seven".