26221255 has 4 divisors (see below), whose sum is σ = 31465512. Its totient is φ = 20977000.

The previous prime is 26221241. The next prime is 26221297. The reversal of 26221255 is 55212262.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 26221255 - 2²¹ = 24124103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2622121 + ... + 2622130.

It is an arithmetic number, because the mean of its divisors is an integer number (7866378).

Almost surely, 2^26221255 is an apocalyptic number.

26221255 is a deficient number, since it is larger than the sum of its proper divisors (5244257).

26221255 is an equidigital number, since it uses as much as digits as its factorization.

26221255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5244256.

The product of its digits is 2400, while the sum is 25.

The square root of 26221255 is about 5120.6693898357. The cubic root of 26221255 is about 297.0875767236.

The spelling of 26221255 in words is "twenty-six million, two hundred twenty-one thousand, two hundred fifty-five".