22213856 has 72 divisors (see below), whose sum is σ = 52629696. Its totient is φ = 9192960.

The previous prime is 22213847. The next prime is 22213859. The reversal of 22213856 is 65831222.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22213859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48380 + ... + 48836.

It is an arithmetic number, because the mean of its divisors is an integer number (730968).

Almost surely, 2^22213856 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 22213856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26314848).

22213856 is an abundant number, since it is smaller than the sum of its proper divisors (30415840).

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

22213856 is a wasteful number, since it uses less digits than its factorization.

22213856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 497 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 22213856 is about 4713.1577525052. The cubic root of 22213856 is about 281.1089356132.

The spelling of 22213856 in words is "twenty-two million, two hundred thirteen thousand, eight hundred fifty-six".