26216005 has 4 divisors (see below), whose sum is σ = 31459212. Its totient is φ = 20972800.

The previous prime is 26215957. The next prime is 26216009. The reversal of 26216005 is 50061262.

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 15233409 + 10982596 = 3903^2 + 3314^2 .

It is not a de Polignac number, because 26216005 - 2¹⁵ = 26183237 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26216009) 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, 2621596 + ... + 2621605.

It is an arithmetic number, because the mean of its divisors is an integer number (7864803).

Almost surely, 2^26216005 is an apocalyptic number.

It is an amenable number.

26216005 is a deficient number, since it is larger than the sum of its proper divisors (5243207).

26216005 is an equidigital number, since it uses as much as digits as its factorization.

26216005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243206.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 26216005 is about 5120.1567358822. The cubic root of 26216005 is about 297.0677478496.

Adding to 26216005 its reverse (50061262), we get a palindrome (76277267).

The spelling of 26216005 in words is "twenty-six million, two hundred sixteen thousand, five".