22440243 has 32 divisors (see below), whose sum is σ = 35642880. Its totient is φ = 12291840.

The previous prime is 22440239. The next prime is 22440247. The reversal of 22440243 is 34204422.

It is an interprime number because it is at equal distance from previous prime (22440239) and next prime (22440247).

It is not a de Polignac number, because 22440243 - 2² = 22440239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22440247) 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 in 31 ways as a sum of consecutive naturals, for example, 57493 + ... + 57881.

It is an arithmetic number, because the mean of its divisors is an integer number (1113840).

Almost surely, 2^22440243 is an apocalyptic number.

22440243 is a deficient number, since it is larger than the sum of its proper divisors (13202637).

22440243 is a wasteful number, since it uses less digits than its factorization.

22440243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 22440243 is about 4737.1133615315. The cubic root of 22440243 is about 282.0606604579.

Adding to 22440243 its reverse (34204422), we get a palindrome (56644665).

The spelling of 22440243 in words is "twenty-two million, four hundred forty thousand, two hundred forty-three".