26081231 has 4 divisors (see below), whose sum is σ = 28452264. Its totient is φ = 23710200.

The previous prime is 26081227. The next prime is 26081249. The reversal of 26081231 is 13218062.

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

It is a cyclic number.

It is not a de Polignac number, because 26081231 - 2² = 26081227 is a prime.

It is a super-2 number, since 2×26081231² = 1360461220950722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26081197 and 26081206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26081431) 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, 1185500 + ... + 1185521.

It is an arithmetic number, because the mean of its divisors is an integer number (7113066).

Almost surely, 2^26081231 is an apocalyptic number.

26081231 is a deficient number, since it is larger than the sum of its proper divisors (2371033).

26081231 is a wasteful number, since it uses less digits than its factorization.

26081231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371032.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 26081231 is about 5106.9786567010. The cubic root of 26081231 is about 296.5578072733.

Adding to 26081231 its reverse (13218062), we get a palindrome (39299293).

The spelling of 26081231 in words is "twenty-six million, eighty-one thousand, two hundred thirty-one".