26851231 has 18 divisors (see below), whose sum is σ = 30462320. Its totient is φ = 23646480.

The previous prime is 26851219. The next prime is 26851243. The reversal of 26851231 is 13215862.

It is an interprime number because it is at equal distance from previous prime (26851219) and next prime (26851243).

It is not a de Polignac number, because 26851231 - 2¹¹ = 26849183 is a prime.

It is a super-2 number, since 2×26851231² = 1441977212430722, 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 26851231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26851261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 339850 + ... + 339928.

Almost surely, 2^26851231 is an apocalyptic number.

26851231 is a deficient number, since it is larger than the sum of its proper divisors (3611089).

26851231 is an equidigital number, since it uses as much as digits as its factorization.

26851231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 143 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 26851231 is about 5181.8173452950. The cubic root of 26851231 is about 299.4479886048.

It can be divided in two parts, 2685 and 1231, that added together give a triangular number (3916 = T₈₈).

The spelling of 26851231 in words is "twenty-six million, eight hundred fifty-one thousand, two hundred thirty-one".