22057505 has 4 divisors (see below), whose sum is σ = 26469012. Its totient is φ = 17646000.

The previous prime is 22057489. The next prime is 22057507. The reversal of 22057505 is 50575022.

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 6431296 + 15626209 = 2536^2 + 3953^2 .

It is not a de Polignac number, because 22057505 - 2⁴ = 22057489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22057507) 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, 2205746 + ... + 2205755.

It is an arithmetic number, because the mean of its divisors is an integer number (6617253).

Almost surely, 2^22057505 is an apocalyptic number.

It is an amenable number.

22057505 is a deficient number, since it is larger than the sum of its proper divisors (4411507).

22057505 is an equidigital number, since it uses as much as digits as its factorization.

22057505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411506.

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 22057505 is about 4696.5418128661. The cubic root of 22057505 is about 280.4478589496.

The spelling of 22057505 in words is "twenty-two million, fifty-seven thousand, five hundred five".