22621253 has 2 divisors, whose sum is σ = 22621254. Its totient is φ = 22621252.

The previous prime is 22621187. The next prime is 22621279. The reversal of 22621253 is 35212622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22486564 + 134689 = 4742^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 22621253 - 2¹⁰ = 22620229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22621283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11310626 + 11310627.

It is an arithmetic number, because the mean of its divisors is an integer number (11310627).

Almost surely, 2^22621253 is an apocalyptic number.

It is an amenable number.

22621253 is a deficient number, since it is larger than the sum of its proper divisors (1).

22621253 is an equidigital number, since it uses as much as digits as its factorization.

22621253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 22621253 is about 4756.1805054056. The cubic root of 22621253 is about 282.8170268172.

Adding to 22621253 its reverse (35212622), we get a palindrome (57833875).

The spelling of 22621253 in words is "twenty-two million, six hundred twenty-one thousand, two hundred fifty-three".