26155931 has 2 divisors, whose sum is σ = 26155932. Its totient is φ = 26155930.

The previous prime is 26155901. The next prime is 26155933. The reversal of 26155931 is 13955162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26155931 - 2¹⁸ = 25893787 is a prime.

It is a super-2 number, since 2×26155931² = 1368265452953522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 26155933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26155933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13077965 + 13077966.

It is an arithmetic number, because the mean of its divisors is an integer number (13077966).

Almost surely, 2^26155931 is an apocalyptic number.

26155931 is a deficient number, since it is larger than the sum of its proper divisors (1).

26155931 is an equidigital number, since it uses as much as digits as its factorization.

26155931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 32.

The square root of 26155931 is about 5114.2869493215. The cubic root of 26155931 is about 296.8406639661.

The spelling of 26155931 in words is "twenty-six million, one hundred fifty-five thousand, nine hundred thirty-one".