26161831 has 2 divisors, whose sum is σ = 26161832. Its totient is φ = 26161830.

The previous prime is 26161823. The next prime is 26161859. The reversal of 26161831 is 13816162.

It is an a-pointer prime, because the next prime (26161859) can be obtained adding 26161831 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26161831 - 2³ = 26161823 is a prime.

It is a super-2 number, since 2×26161831² = 1368882802545122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26161831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26161801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13080915 + 13080916.

It is an arithmetic number, because the mean of its divisors is an integer number (13080916).

Almost surely, 2^26161831 is an apocalyptic number.

26161831 is a deficient number, since it is larger than the sum of its proper divisors (1).

26161831 is an equidigital number, since it uses as much as digits as its factorization.

26161831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 26161831 is about 5114.8637323002. The cubic root of 26161831 is about 296.8629817628.

Adding to 26161831 its reverse (13816162), we get a palindrome (39977993).

The spelling of 26161831 in words is "twenty-six million, one hundred sixty-one thousand, eight hundred thirty-one".