26231631 has 24 divisors (see below), whose sum is σ = 37334544. Its totient is φ = 16369920.

The previous prime is 26231627. The next prime is 26231641. The reversal of 26231631 is 13613262.

It is a happy number.

It is not a de Polignac number, because 26231631 - 2² = 26231627 is a prime.

It is a super-2 number, since 2×26231631² = 1376196929840322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26231641) 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 23 ways as a sum of consecutive naturals, for example, 93211 + ... + 93491.

It is an arithmetic number, because the mean of its divisors is an integer number (1555606).

Almost surely, 2^26231631 is an apocalyptic number.

26231631 is a deficient number, since it is larger than the sum of its proper divisors (11102913).

26231631 is a wasteful number, since it uses less digits than its factorization.

26231631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 350 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 26231631 is about 5121.6824384181. The cubic root of 26231631 is about 297.1267583492.

Adding to 26231631 its reverse (13613262), we get a palindrome (39844893).

It can be divided in two parts, 26231 and 631, that added together give a palindrome (26862).

The spelling of 26231631 in words is "twenty-six million, two hundred thirty-one thousand, six hundred thirty-one".