22200445 has 4 divisors (see below), whose sum is σ = 26640540. Its totient is φ = 17760352.

The previous prime is 22200443. The next prime is 22200449. The reversal of 22200445 is 54400222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54400222 = 2 ⋅27200111.

It can be written as a sum of positive squares in 2 ways, for example, as 12830724 + 9369721 = 3582^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 22200445 - 2¹ = 22200443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2220040 + ... + 2220049.

It is an arithmetic number, because the mean of its divisors is an integer number (6660135).

Almost surely, 2^22200445 is an apocalyptic number.

It is an amenable number.

22200445 is a deficient number, since it is larger than the sum of its proper divisors (4440095).

22200445 is an equidigital number, since it uses as much as digits as its factorization.

22200445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440094.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 22200445 is about 4711.7348185143. The cubic root of 22200445 is about 281.0523536483.

Adding to 22200445 its reverse (54400222), we get a palindrome (76600667).

The spelling of 22200445 in words is "twenty-two million, two hundred thousand, four hundred forty-five".