26881513 has 6 divisors (see below), whose sum is σ = 27171006. Its totient is φ = 26595072.

The previous prime is 26881507. The next prime is 26881529. The reversal of 26881513 is 31518862.

It can be written as a sum of positive squares in 3 ways, for example, as 4678569 + 22202944 = 2163^2 + 4712^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26881513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26881583) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7981 + ... + 10837.

It is an arithmetic number, because the mean of its divisors is an integer number (4528501).

Almost surely, 2^26881513 is an apocalyptic number.

It is an amenable number.

26881513 is a deficient number, since it is larger than the sum of its proper divisors (289493).

26881513 is an frugal number, since it uses more digits than its factorization.

26881513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051 (or 2954 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 26881513 is about 5184.7384697784. The cubic root of 26881513 is about 299.5605157523.

The spelling of 26881513 in words is "twenty-six million, eight hundred eighty-one thousand, five hundred thirteen".