26627221 has 2 divisors, whose sum is σ = 26627222. Its totient is φ = 26627220.

The previous prime is 26627213. The next prime is 26627243. The reversal of 26627221 is 12272662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22667121 + 3960100 = 4761^2 + 1990^2 .

It is a cyclic number.

It is not a de Polignac number, because 26627221 - 2³ = 26627213 is a prime.

It is equal to p_1661266 and since 26627221 and 1661266 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26627221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26627281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13313610 + 13313611.

It is an arithmetic number, because the mean of its divisors is an integer number (13313611).

Almost surely, 2^26627221 is an apocalyptic number.

It is an amenable number.

26627221 is a deficient number, since it is larger than the sum of its proper divisors (1).

26627221 is an equidigital number, since it uses as much as digits as its factorization.

26627221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 26627221 is about 5160.1570712528. The cubic root of 26627221 is about 298.6129337449.

Adding to 26627221 its reverse (12272662), we get a palindrome (38899883).

The spelling of 26627221 in words is "twenty-six million, six hundred twenty-seven thousand, two hundred twenty-one".