22020551 has 6 divisors (see below), whose sum is σ = 25615800. Its totient is φ = 18874716.

The previous prime is 22020547. The next prime is 22020569. The reversal of 22020551 is 15502022.

It is not a de Polignac number, because 22020551 - 2² = 22020547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020751) 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, 224651 + ... + 224748.

It is an arithmetic number, because the mean of its divisors is an integer number (4269300).

Almost surely, 2^22020551 is an apocalyptic number.

22020551 is a deficient number, since it is larger than the sum of its proper divisors (3595249).

22020551 is an equidigital number, since it uses as much as digits as its factorization.

22020551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449413 (or 449406 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 22020551 is about 4692.6059924098. The cubic root of 22020551 is about 280.2911554730.

Adding to 22020551 its reverse (15502022), we get a palindrome (37522573).

The spelling of 22020551 in words is "twenty-two million, twenty thousand, five hundred fifty-one".