22071305 has 4 divisors (see below), whose sum is σ = 26485572. Its totient is φ = 17657040.

The previous prime is 22071281. The next prime is 22071307. The reversal of 22071305 is 50317022.

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 2393209 + 19678096 = 1547^2 + 4436^2 .

It is not a de Polignac number, because 22071305 - 2⁶ = 22071241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22071307) 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, 2207126 + ... + 2207135.

It is an arithmetic number, because the mean of its divisors is an integer number (6621393).

Almost surely, 2^22071305 is an apocalyptic number.

It is an amenable number.

22071305 is a deficient number, since it is larger than the sum of its proper divisors (4414267).

22071305 is an equidigital number, since it uses as much as digits as its factorization.

22071305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414266.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 22071305 is about 4698.0107492427. The cubic root of 22071305 is about 280.5063329796.

Adding to 22071305 its reverse (50317022), we get a palindrome (72388327).

The spelling of 22071305 in words is "twenty-two million, seventy-one thousand, three hundred five".