26551213 has 4 divisors (see below), whose sum is σ = 28593628. Its totient is φ = 24508800.

The previous prime is 26551181. The next prime is 26551277. The reversal of 26551213 is 31215562.

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 1119364 + 25431849 = 1058^2 + 5043^2 .

It is a cyclic number.

It is not a de Polignac number, because 26551213 - 2⁵ = 26551181 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 (26551513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021188 + ... + 1021213.

It is an arithmetic number, because the mean of its divisors is an integer number (7148407).

Almost surely, 2^26551213 is an apocalyptic number.

It is an amenable number.

26551213 is a deficient number, since it is larger than the sum of its proper divisors (2042415).

26551213 is a wasteful number, since it uses less digits than its factorization.

26551213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042414.

The product of its digits is 1800, while the sum is 25.

The square root of 26551213 is about 5152.7869158350. The cubic root of 26551213 is about 298.3285305206.

Adding to 26551213 its reverse (31215562), we get a palindrome (57766775).

The spelling of 26551213 in words is "twenty-six million, five hundred fifty-one thousand, two hundred thirteen".