22247136 has 72 divisors (see below), whose sum is σ = 65631384. Its totient is φ = 7413120.

The previous prime is 22247129. The next prime is 22247143. The reversal of 22247136 is 63174222.

It is an interprime number because it is at equal distance from previous prime (22247129) and next prime (22247143).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 11 ways as a sum of consecutive naturals, for example, 6346 + ... + 9206.

It is an arithmetic number, because the mean of its divisors is an integer number (911547).

Almost surely, 2^22247136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22247136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32815692).

22247136 is an abundant number, since it is smaller than the sum of its proper divisors (43384248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22247136 is an equidigital number, since it uses as much as digits as its factorization.

22247136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886 (or 2866 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 22247136 is about 4716.6869728656. The cubic root of 22247136 is about 281.2492479980.

The spelling of 22247136 in words is "twenty-two million, two hundred forty-seven thousand, one hundred thirty-six".