22566403 has 2 divisors, whose sum is σ = 22566404. Its totient is φ = 22566402.

The previous prime is 22566389. The next prime is 22566413. The reversal of 22566403 is 30466522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22566403 - 2¹⁷ = 22435331 is a prime.

It is not a weakly prime, because it can be changed into another prime (22566413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11283201 + 11283202.

It is an arithmetic number, because the mean of its divisors is an integer number (11283202).

Almost surely, 2^22566403 is an apocalyptic number.

22566403 is a deficient number, since it is larger than the sum of its proper divisors (1).

22566403 is an equidigital number, since it uses as much as digits as its factorization.

22566403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 22566403 is about 4750.4108243393. The cubic root of 22566403 is about 282.5882586374.

The spelling of 22566403 in words is "twenty-two million, five hundred sixty-six thousand, four hundred three".