22251056 has 40 divisors (see below), whose sum is σ = 45009024. Its totient is φ = 10644480.

The previous prime is 22251049. The next prime is 22251067. The reversal of 22251056 is 65015222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55850 + ... + 56246.

Almost surely, 2^22251056 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 22251056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22504512).

22251056 is an abundant number, since it is smaller than the sum of its proper divisors (22757968).

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

22251056 is a wasteful number, since it uses less digits than its factorization.

22251056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 22251056 is about 4717.1025004763. The cubic root of 22251056 is about 281.2657659639.

Adding to 22251056 its reverse (65015222), we get a palindrome (87266278).

The spelling of 22251056 in words is "twenty-two million, two hundred fifty-one thousand, fifty-six".