22508533 has 2 divisors, whose sum is σ = 22508534. Its totient is φ = 22508532.

The previous prime is 22508471. The next prime is 22508537. The reversal of 22508533 is 33580522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16834609 + 5673924 = 4103^2 + 2382^2 .

It is a cyclic number.

It is not a de Polignac number, because 22508533 - 2⁹ = 22508021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22508537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11254266 + 11254267.

It is an arithmetic number, because the mean of its divisors is an integer number (11254267).

Almost surely, 2^22508533 is an apocalyptic number.

It is an amenable number.

22508533 is a deficient number, since it is larger than the sum of its proper divisors (1).

22508533 is an equidigital number, since it uses as much as digits as its factorization.

22508533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 22508533 is about 4744.3158621660. The cubic root of 22508533 is about 282.3464924223.

The spelling of 22508533 in words is "twenty-two million, five hundred eight thousand, five hundred thirty-three".