26613221 has 8 divisors (see below), whose sum is σ = 27552000. Its totient is φ = 25679520.

The previous prime is 26613217. The next prime is 26613239. The reversal of 26613221 is 12231662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26613221 - 2² = 26613217 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 (26613241) 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 7 ways as a sum of consecutive naturals, for example, 11630 + ... + 13728.

It is an arithmetic number, because the mean of its divisors is an integer number (3444000).

Almost surely, 2^26613221 is an apocalyptic number.

It is an amenable number.

26613221 is a deficient number, since it is larger than the sum of its proper divisors (938779).

26613221 is a wasteful number, since it uses less digits than its factorization.

26613221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539.

The product of its digits is 864, while the sum is 23.

The square root of 26613221 is about 5158.8003450415. The cubic root of 26613221 is about 298.5605898926.

Adding to 26613221 its reverse (12231662), we get a palindrome (38844883).

The spelling of 26613221 in words is "twenty-six million, six hundred thirteen thousand, two hundred twenty-one".