26215229 has 2 divisors, whose sum is σ = 26215230. Its totient is φ = 26215228.

The previous prime is 26215219. The next prime is 26215247. The reversal of 26215229 is 92251262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25989604 + 225625 = 5098^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 26215229 - 2⁸ = 26214973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26215219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13107614 + 13107615.

It is an arithmetic number, because the mean of its divisors is an integer number (13107615).

Almost surely, 2^26215229 is an apocalyptic number.

It is an amenable number.

26215229 is a deficient number, since it is larger than the sum of its proper divisors (1).

26215229 is an equidigital number, since it uses as much as digits as its factorization.

26215229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 26215229 is about 5120.0809563912. The cubic root of 26215229 is about 297.0648167286.

The spelling of 26215229 in words is "twenty-six million, two hundred fifteen thousand, two hundred twenty-nine".