26316431 has 4 divisors (see below), whose sum is σ = 26490864. Its totient is φ = 26142000.

The previous prime is 26316379. The next prime is 26316443. The reversal of 26316431 is 13461362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13461362 = 2 ⋅6730681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26316431 is a prime.

It is a super-2 number, since 2×26316431² = 1385109081155522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26316431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26316481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86990 + ... + 87291.

It is an arithmetic number, because the mean of its divisors is an integer number (6622716).

Almost surely, 2^26316431 is an apocalyptic number.

26316431 is a deficient number, since it is larger than the sum of its proper divisors (174433).

26316431 is a wasteful number, since it uses less digits than its factorization.

26316431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174432.

The product of its digits is 2592, while the sum is 26.

The square root of 26316431 is about 5129.9542882954. The cubic root of 26316431 is about 297.4465916412.

Adding to 26316431 its reverse (13461362), we get a palindrome (39777793).

The spelling of 26316431 in words is "twenty-six million, three hundred sixteen thousand, four hundred thirty-one".