26513831 has 2 divisors, whose sum is σ = 26513832. Its totient is φ = 26513830.

The previous prime is 26513821. The next prime is 26513857. The reversal of 26513831 is 13831562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26513831 - 2¹⁰ = 26512807 is a prime.

It is a super-2 number, since 2×26513831² = 1405966468593122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26513794 and 26513803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26513821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13256915 + 13256916.

It is an arithmetic number, because the mean of its divisors is an integer number (13256916).

Almost surely, 2^26513831 is an apocalyptic number.

26513831 is a deficient number, since it is larger than the sum of its proper divisors (1).

26513831 is an equidigital number, since it uses as much as digits as its factorization.

26513831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 26513831 is about 5149.1582807290. The cubic root of 26513831 is about 298.1884571338.

The spelling of 26513831 in words is "twenty-six million, five hundred thirteen thousand, eight hundred thirty-one".