22187371 has 2 divisors, whose sum is σ = 22187372. Its totient is φ = 22187370.

The previous prime is 22187369. The next prime is 22187461. The reversal of 22187371 is 17378122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22187371 - 2¹ = 22187369 is a prime.

Together with 22187369, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22187171) 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 as a sum of consecutive naturals, namely, 11093685 + 11093686.

It is an arithmetic number, because the mean of its divisors is an integer number (11093686).

Almost surely, 2^22187371 is an apocalyptic number.

22187371 is a deficient number, since it is larger than the sum of its proper divisors (1).

22187371 is an equidigital number, since it uses as much as digits as its factorization.

22187371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 31.

The square root of 22187371 is about 4710.3472271161. The cubic root of 22187371 is about 280.9971715710.

Subtracting from 22187371 its reverse (17378122), we obtain a square (4809249 = 2193²).

The spelling of 22187371 in words is "twenty-two million, one hundred eighty-seven thousand, three hundred seventy-one".