21227753 has 2 divisors, whose sum is σ = 21227754. Its totient is φ = 21227752.

The previous prime is 21227711. The next prime is 21227779. The reversal of 21227753 is 35772212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20403289 + 824464 = 4517^2 + 908^2 .

It is a cyclic number.

It is not a de Polignac number, because 21227753 - 2¹⁰ = 21226729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21227783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10613876 + 10613877.

It is an arithmetic number, because the mean of its divisors is an integer number (10613877).

Almost surely, 2^21227753 is an apocalyptic number.

It is an amenable number.

21227753 is a deficient number, since it is larger than the sum of its proper divisors (1).

21227753 is an equidigital number, since it uses as much as digits as its factorization.

21227753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 29.

The square root of 21227753 is about 4607.3585708082. The cubic root of 21227753 is about 276.8862196535.

Adding to 21227753 its reverse (35772212), we get a palindrome (56999965).

The spelling of 21227753 in words is "twenty-one million, two hundred twenty-seven thousand, seven hundred fifty-three".