26244221 has 4 divisors (see below), whose sum is σ = 26259744. Its totient is φ = 26228700.

The previous prime is 26244199. The next prime is 26244241. The reversal of 26244221 is 12244262.

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 a de Polignac number, because none of the positive numbers 2^k-26244221 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 (26244241) 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, 4865 + ... + 8726.

It is an arithmetic number, because the mean of its divisors is an integer number (6564936).

Almost surely, 2^26244221 is an apocalyptic number.

It is an amenable number.

26244221 is a deficient number, since it is larger than the sum of its proper divisors (15523).

26244221 is a wasteful number, since it uses less digits than its factorization.

26244221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15522.

The product of its digits is 1536, while the sum is 23.

The square root of 26244221 is about 5122.9113792842. The cubic root of 26244221 is about 297.1742865613.

Adding to 26244221 its reverse (12244262), we get a palindrome (38488483).

The spelling of 26244221 in words is "twenty-six million, two hundred forty-four thousand, two hundred twenty-one".