22140544 has 16 divisors (see below), whose sum is σ = 44108370. Its totient is φ = 11070208.

The previous prime is 22140527. The next prime is 22140557. The reversal of 22140544 is 44504122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 238144 = 4680^2 + 488^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86359 + ... + 86614.

Almost surely, 2^22140544 is an apocalyptic number.

It is an amenable number.

22140544 is a deficient number, since it is larger than the sum of its proper divisors (21967826).

22140544 is an equidigital number, since it uses as much as digits as its factorization.

22140544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172987 (or 172975 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 22140544 is about 4705.3739490077. The cubic root of 22140544 is about 280.7993484886.

Adding to 22140544 its reverse (44504122), we get a palindrome (66644666).

The spelling of 22140544 in words is "twenty-two million, one hundred forty thousand, five hundred forty-four".