22322556 has 72 divisors (see below), whose sum is σ = 58705920. Its totient is φ = 7147296.

The previous prime is 22322551. The next prime is 22322557. The reversal of 22322556 is 65522322.

It is a super-3 number, since 3×22322556³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22322551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133585 + ... + 133751.

It is an arithmetic number, because the mean of its divisors is an integer number (815360).

Almost surely, 2^22322556 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 22322556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29352960).

22322556 is an abundant number, since it is smaller than the sum of its proper divisors (36383364).

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

22322556 is a wasteful number, since it uses less digits than its factorization.

22322556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 298 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 22322556 is about 4724.6752269336. The cubic root of 22322556 is about 281.5667104835.

Adding to 22322556 its reverse (65522322), we get a palindrome (87844878).

The spelling of 22322556 in words is "twenty-two million, three hundred twenty-two thousand, five hundred fifty-six".