22320544 has 24 divisors (see below), whose sum is σ = 44123940. Its totient is φ = 11114496.

The previous prime is 22320503. The next prime is 22320559. The reversal of 22320544 is 44502322.

22320544 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 21344400 + 976144 = 4620^2 + 988^2 .

It is a super-3 number, since 3×22320544³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7312 + ... + 9904.

Almost surely, 2^22320544 is an apocalyptic number.

It is an amenable number.

22320544 is a deficient number, since it is larger than the sum of its proper divisors (21803396).

22320544 is a wasteful number, since it uses less digits than its factorization.

22320544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872 (or 2864 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 22320544 is about 4724.4622974472. The cubic root of 22320544 is about 281.5582507408.

Adding to 22320544 its reverse (44502322), we get a palindrome (66822866).

The spelling of 22320544 in words is "twenty-two million, three hundred twenty thousand, five hundred forty-four".