26133221 has 4 divisors (see below), whose sum is σ = 27269472. Its totient is φ = 24996972.

The previous prime is 26133209. The next prime is 26133223. The reversal of 26133221 is 12233162.

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 26133221 - 2¹⁴ = 26116837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26133193 and 26133202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26133223) 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, 568091 + ... + 568136.

It is an arithmetic number, because the mean of its divisors is an integer number (6817368).

Almost surely, 2^26133221 is an apocalyptic number.

It is an amenable number.

26133221 is a deficient number, since it is larger than the sum of its proper divisors (1136251).

26133221 is a wasteful number, since it uses less digits than its factorization.

26133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136250.

The product of its digits is 432, while the sum is 20.

The square root of 26133221 is about 5112.0662163161. The cubic root of 26133221 is about 296.7547280273.

Adding to 26133221 its reverse (12233162), we get a palindrome (38366383).

The spelling of 26133221 in words is "twenty-six million, one hundred thirty-three thousand, two hundred twenty-one".