26564213 has 4 divisors (see below), whose sum is σ = 28607628. Its totient is φ = 24520800.

The previous prime is 26564207. The next prime is 26564231. The reversal of 26564213 is 31246562.

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 16176484 + 10387729 = 4022^2 + 3223^2 .

It is a cyclic number.

It is not a de Polignac number, because 26564213 - 2¹⁰ = 26563189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26564513) 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, 1021688 + ... + 1021713.

It is an arithmetic number, because the mean of its divisors is an integer number (7151907).

Almost surely, 2^26564213 is an apocalyptic number.

It is an amenable number.

26564213 is a deficient number, since it is larger than the sum of its proper divisors (2043415).

26564213 is a wasteful number, since it uses less digits than its factorization.

26564213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043414.

The product of its digits is 8640, while the sum is 29.

The square root of 26564213 is about 5154.0482147531. The cubic root of 26564213 is about 298.3772117630.

The spelling of 26564213 in words is "twenty-six million, five hundred sixty-four thousand, two hundred thirteen".