22445556 has 48 divisors (see below), whose sum is σ = 60211200. Its totient is φ = 6374880.

The previous prime is 22445551. The next prime is 22445557. The reversal of 22445556 is 65554422.

It is a super-3 number, since 3×22445556³ (a number of 23 digits) contains 333 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22445551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15345 + ... + 16743.

It is an arithmetic number, because the mean of its divisors is an integer number (1254400).

Almost surely, 2^22445556 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 22445556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30105600).

22445556 is an abundant number, since it is smaller than the sum of its proper divisors (37765644).

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

22445556 is a wasteful number, since it uses less digits than its factorization.

22445556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1602 counting only the distinct ones).

The product of its digits is 48000, while the sum is 33.

The square root of 22445556 is about 4737.6741128955. The cubic root of 22445556 is about 282.0829191300.

Adding to 22445556 its reverse (65554422), we get a palindrome (87999978).

The spelling of 22445556 in words is "twenty-two million, four hundred forty-five thousand, five hundred fifty-six".