26631229 has 2 divisors, whose sum is σ = 26631230. Its totient is φ = 26631228.

The previous prime is 26631173. The next prime is 26631247. The reversal of 26631229 is 92213662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24980004 + 1651225 = 4998^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 26631229 - 2¹¹ = 26629181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26631229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26631529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13315614 + 13315615.

It is an arithmetic number, because the mean of its divisors is an integer number (13315615).

Almost surely, 2^26631229 is an apocalyptic number.

It is an amenable number.

26631229 is a deficient number, since it is larger than the sum of its proper divisors (1).

26631229 is an equidigital number, since it uses as much as digits as its factorization.

26631229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 26631229 is about 5160.5454169109. The cubic root of 26631229 is about 298.6279156638.

The spelling of 26631229 in words is "twenty-six million, six hundred thirty-one thousand, two hundred twenty-nine".