22440293 has 2 divisors, whose sum is σ = 22440294. Its totient is φ = 22440292.

The previous prime is 22440277. The next prime is 22440307. The reversal of 22440293 is 39204422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16785409 + 5654884 = 4097^2 + 2378^2 .

It is a cyclic number.

It is not a de Polignac number, because 22440293 - 2⁴ = 22440277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22400293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11220146 + 11220147.

It is an arithmetic number, because the mean of its divisors is an integer number (11220147).

Almost surely, 2^22440293 is an apocalyptic number.

It is an amenable number.

22440293 is a deficient number, since it is larger than the sum of its proper divisors (1).

22440293 is an equidigital number, since it uses as much as digits as its factorization.

22440293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 22440293 is about 4737.1186390041. The cubic root of 22440293 is about 282.0608699479.

The spelling of 22440293 in words is "twenty-two million, four hundred forty thousand, two hundred ninety-three".