22638523 has 2 divisors, whose sum is σ = 22638524. Its totient is φ = 22638522.

The previous prime is 22638491. The next prime is 22638569. The reversal of 22638523 is 32583622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22638523 - 2⁵ = 22638491 is a prime.

It is not a weakly prime, because it can be changed into another prime (22638593) 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, 11319261 + 11319262.

It is an arithmetic number, because the mean of its divisors is an integer number (11319262).

Almost surely, 2^22638523 is an apocalyptic number.

22638523 is a deficient number, since it is larger than the sum of its proper divisors (1).

22638523 is an equidigital number, since it uses as much as digits as its factorization.

22638523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 22638523 is about 4757.9956914651. The cubic root of 22638523 is about 282.8889799142. Note that the first 3 decimals are identical.

The spelling of 22638523 in words is "twenty-two million, six hundred thirty-eight thousand, five hundred twenty-three".