22523551 has 2 divisors, whose sum is σ = 22523552. Its totient is φ = 22523550.

The previous prime is 22523549. The next prime is 22523581. The reversal of 22523551 is 15532522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22523551 - 2¹ = 22523549 is a prime.

Together with 22523549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22523581) 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, 11261775 + 11261776.

It is an arithmetic number, because the mean of its divisors is an integer number (11261776).

Almost surely, 2^22523551 is an apocalyptic number.

22523551 is a deficient number, since it is larger than the sum of its proper divisors (1).

22523551 is an equidigital number, since it uses as much as digits as its factorization.

22523551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 25.

The square root of 22523551 is about 4745.8983343515. The cubic root of 22523551 is about 282.4092736043.

The spelling of 22523551 in words is "twenty-two million, five hundred twenty-three thousand, five hundred fifty-one".