26622221 has 8 divisors (see below), whose sum is σ = 28293624. Its totient is φ = 24962560.

The previous prime is 26622217. The next prime is 26622223. The reversal of 26622221 is 12222662.

It can be written as a sum of positive squares in 4 ways, for example, as 2992900 + 23629321 = 1730^2 + 4861^2 .

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 26622221 - 2² = 26622217 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 (26622223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1991 + ... + 7563.

It is an arithmetic number, because the mean of its divisors is an integer number (3536703).

Almost surely, 2^26622221 is an apocalyptic number.

It is an amenable number.

26622221 is a deficient number, since it is larger than the sum of its proper divisors (1671403).

26622221 is a wasteful number, since it uses less digits than its factorization.

26622221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5871.

The product of its digits is 1152, while the sum is 23.

The square root of 26622221 is about 5159.6725671306. The cubic root of 26622221 is about 298.5942416186.

Adding to 26622221 its reverse (12222662), we get a palindrome (38844883).

The spelling of 26622221 in words is "twenty-six million, six hundred twenty-two thousand, two hundred twenty-one".