22243745 has 4 divisors (see below), whose sum is σ = 26692500. Its totient is φ = 17794992.

The previous prime is 22243733. The next prime is 22243787. The reversal of 22243745 is 54734222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3129361 + 19114384 = 1769^2 + 4372^2 .

It is a cyclic number.

It is not a de Polignac number, because 22243745 - 2⁸ = 22243489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224370 + ... + 2224379.

It is an arithmetic number, because the mean of its divisors is an integer number (6673125).

Almost surely, 2^22243745 is an apocalyptic number.

It is an amenable number.

22243745 is a deficient number, since it is larger than the sum of its proper divisors (4448755).

22243745 is an equidigital number, since it uses as much as digits as its factorization.

22243745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4448754.

The product of its digits is 13440, while the sum is 29.

The square root of 22243745 is about 4716.3274907496. The cubic root of 22243745 is about 281.2349575494.

Adding to 22243745 its reverse (54734222), we get a palindrome (76977967).

The spelling of 22243745 in words is "twenty-two million, two hundred forty-three thousand, seven hundred forty-five".