22187841 has 24 divisors (see below), whose sum is σ = 32412960. Its totient is φ = 13493376.

The previous prime is 22187821. The next prime is 22187843. The reversal of 22187841 is 14878122.

It is a happy number.

It is not a de Polignac number, because 22187841 - 2¹³ = 22179649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22187843) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 54045 + ... + 54453.

It is an arithmetic number, because the mean of its divisors is an integer number (1350540).

Almost surely, 2^22187841 is an apocalyptic number.

It is an amenable number.

22187841 is a deficient number, since it is larger than the sum of its proper divisors (10225119).

22187841 is a wasteful number, since it uses less digits than its factorization.

22187841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 532 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 22187841 is about 4710.3971170168. The cubic root of 22187841 is about 280.9991556988. Note that the first 3 decimals are identical.

The spelling of 22187841 in words is "twenty-two million, one hundred eighty-seven thousand, eight hundred forty-one".