22320522 has 56 divisors (see below), whose sum is σ = 57395616. Its totient is φ = 6377292.

The previous prime is 22320503. The next prime is 22320559. The reversal of 22320522 is 22502322.

It is a super-3 number, since 3×22320522³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22320495 and 22320504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3188643 + ... + 3188649.

Almost surely, 2^22320522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22320522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28697808).

22320522 is an abundant number, since it is smaller than the sum of its proper divisors (35075094).

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

22320522 is an frugal number, since it uses more digits than its factorization.

22320522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48 (or 12 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 22320522 is about 4724.4599691393. The cubic root of 22320522 is about 281.5581582358.

Adding to 22320522 its reverse (22502322), we get a palindrome (44822844).

The spelling of 22320522 in words is "twenty-two million, three hundred twenty thousand, five hundred twenty-two".