26213213 has 4 divisors (see below), whose sum is σ = 28229628. Its totient is φ = 24196800.

The previous prime is 26213189. The next prime is 26213221. The reversal of 26213213 is 31231262.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18130564 + 8082649 = 4258^2 + 2843^2 .

It is a cyclic number.

It is not a de Polignac number, because 26213213 - 2⁶ = 26213149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26213233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1008188 + ... + 1008213.

It is an arithmetic number, because the mean of its divisors is an integer number (7057407).

Almost surely, 2^26213213 is an apocalyptic number.

It is an amenable number.

26213213 is a deficient number, since it is larger than the sum of its proper divisors (2016415).

26213213 is a wasteful number, since it uses less digits than its factorization.

26213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016414.

The product of its digits is 432, while the sum is 20.

The square root of 26213213 is about 5119.8840807190. The cubic root of 26213213 is about 297.0572015873.

Adding to 26213213 its reverse (31231262), we get a palindrome (57444475).

It can be divided in two parts, 262132 and 13, that multiplied together give a square (3407716 = 1846²).

The spelling of 26213213 in words is "twenty-six million, two hundred thirteen thousand, two hundred thirteen".