22140556 has 6 divisors (see below), whose sum is σ = 38745980. Its totient is φ = 11070276.

The previous prime is 22140527. The next prime is 22140557. The reversal of 22140556 is 65504122.

It is a self number, because there is not a number n which added to its sum of digits gives 22140556.

It is not an unprimeable number, because it can be changed into a prime (22140557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2767566 + ... + 2767573.

Almost surely, 2^22140556 is an apocalyptic number.

It is an amenable number.

22140556 is a deficient number, since it is larger than the sum of its proper divisors (16605424).

22140556 is a wasteful number, since it uses less digits than its factorization.

22140556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5535143 (or 5535141 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 22140556 is about 4705.3752241453. The cubic root of 22140556 is about 280.7993992190.

Adding to 22140556 its reverse (65504122), we get a palindrome (87644678).

The spelling of 22140556 in words is "twenty-two million, one hundred forty thousand, five hundred fifty-six".