26312381 has 4 divisors (see below), whose sum is σ = 26356764. Its totient is φ = 26268000.

The previous prime is 26312371. The next prime is 26312383. The reversal of 26312381 is 18321362.

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 24661156 + 1651225 = 4966^2 + 1285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26312381 is a prime.

It is a super-2 number, since 2×26312381² = 1384682787778322, 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 26312381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26312383) 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, 21290 + ... + 22491.

It is an arithmetic number, because the mean of its divisors is an integer number (6589191).

Almost surely, 2^26312381 is an apocalyptic number.

It is an amenable number.

26312381 is a deficient number, since it is larger than the sum of its proper divisors (44383).

26312381 is an equidigital number, since it uses as much as digits as its factorization.

26312381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44382.

The product of its digits is 1728, while the sum is 26.

The square root of 26312381 is about 5129.5595327474. The cubic root of 26312381 is about 297.4313322202.

The spelling of 26312381 in words is "twenty-six million, three hundred twelve thousand, three hundred eighty-one".