26221109 has 2 divisors, whose sum is σ = 26221110. Its totient is φ = 26221108.

The previous prime is 26221103. The next prime is 26221141. The reversal of 26221109 is 90112262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20566225 + 5654884 = 4535^2 + 2378^2 .

It is a cyclic number.

It is not a de Polignac number, because 26221109 - 2⁴ = 26221093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26221103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13110554 + 13110555.

It is an arithmetic number, because the mean of its divisors is an integer number (13110555).

Almost surely, 2^26221109 is an apocalyptic number.

It is an amenable number.

26221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

26221109 is an equidigital number, since it uses as much as digits as its factorization.

26221109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 26221109 is about 5120.6551338672. The cubic root of 26221109 is about 297.0870253279.

The spelling of 26221109 in words is "twenty-six million, two hundred twenty-one thousand, one hundred nine".