22509523 has 2 divisors, whose sum is σ = 22509524. Its totient is φ = 22509522.

The previous prime is 22509499. The next prime is 22509527. The reversal of 22509523 is 32590522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22509523 - 2⁵ = 22509491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22509491 and 22509500.

It is not a weakly prime, because it can be changed into another prime (22509527) 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, 11254761 + 11254762.

It is an arithmetic number, because the mean of its divisors is an integer number (11254762).

Almost surely, 2^22509523 is an apocalyptic number.

22509523 is a deficient number, since it is larger than the sum of its proper divisors (1).

22509523 is an equidigital number, since it uses as much as digits as its factorization.

22509523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 22509523 is about 4744.4201963991. The cubic root of 22509523 is about 282.3506318736.

It can be divided in two parts, 22509 and 523, that added together give a palindrome (23032).

The spelling of 22509523 in words is "twenty-two million, five hundred nine thousand, five hundred twenty-three".