26501213 has 4 divisors (see below), whose sum is σ = 27217500. Its totient is φ = 25784928.

The previous prime is 26501197. The next prime is 26501227. The reversal of 26501213 is 31210562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31210562 = 2 ⋅15605281.

It can be written as a sum of positive squares in 2 ways, for example, as 23396569 + 3104644 = 4837^2 + 1762^2 .

It is a cyclic number.

It is not a de Polignac number, because 26501213 - 2⁴ = 26501197 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 (26501413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358088 + ... + 358161.

It is an arithmetic number, because the mean of its divisors is an integer number (6804375).

Almost surely, 2^26501213 is an apocalyptic number.

It is an amenable number.

26501213 is a deficient number, since it is larger than the sum of its proper divisors (716287).

26501213 is an equidigital number, since it uses as much as digits as its factorization.

26501213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716286.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 26501213 is about 5147.9328861204. The cubic root of 26501213 is about 298.1411467447.

Adding to 26501213 its reverse (31210562), we get a palindrome (57711775).

The spelling of 26501213 in words is "twenty-six million, five hundred one thousand, two hundred thirteen".