22000554 has 12 divisors (see below), whose sum is σ = 47667906. Its totient is φ = 7333512.

The previous prime is 22000553. The next prime is 22000579. The reversal of 22000554 is 45500022.

It can be written as a sum of positive squares in only one way, i.e., 15421329 + 6579225 = 3927^2 + 2565^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1222253 = 22000554 / (2 + 2 + 0 + 0 + 0 + 5 + 5 + 4).

It is not an unprimeable number, because it can be changed into a prime (22000553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611109 + ... + 611144.

Almost surely, 2^22000554 is an apocalyptic number.

22000554 is an abundant number, since it is smaller than the sum of its proper divisors (25667352).

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

22000554 is a wasteful number, since it uses less digits than its factorization.

22000554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222261 (or 1222258 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 22000554 is about 4690.4748160501. The cubic root of 22000554 is about 280.2062850606.

Adding to 22000554 its reverse (45500022), we get a palindrome (67500576).

The spelling of 22000554 in words is "twenty-two million, five hundred fifty-four", and thus it is an aban number.