26144221 has 4 divisors (see below), whose sum is σ = 26201152. Its totient is φ = 26087292.

The previous prime is 26144219. The next prime is 26144233. The reversal of 26144221 is 12244162.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26144221 - 2¹ = 26144219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26144192 and 26144201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26144201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27771 + ... + 28696.

It is an arithmetic number, because the mean of its divisors is an integer number (6550288).

Almost surely, 2^26144221 is an apocalyptic number.

It is an amenable number.

26144221 is a deficient number, since it is larger than the sum of its proper divisors (56931).

26144221 is an equidigital number, since it uses as much as digits as its factorization.

26144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56930.

The product of its digits is 768, while the sum is 22.

The square root of 26144221 is about 5113.1419890318. The cubic root of 26144221 is about 296.7963588709.

Adding to 26144221 its reverse (12244162), we get a palindrome (38388383).

The spelling of 26144221 in words is "twenty-six million, one hundred forty-four thousand, two hundred twenty-one".