81096131 has 2 divisors, whose sum is σ = 81096132. Its totient is φ = 81096130.

The previous prime is 81096121. The next prime is 81096133. The reversal of 81096131 is 13169018.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81096131 is a prime.

It is a super-2 number, since 2×81096131² = 13153164926338322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 81096133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 81096094 and 81096103.

It is not a weakly prime, because it can be changed into another prime (81096133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40548065 + 40548066.

It is an arithmetic number, because the mean of its divisors is an integer number (40548066).

Almost surely, 2^81096131 is an apocalyptic number.

81096131 is a deficient number, since it is larger than the sum of its proper divisors (1).

81096131 is an equidigital number, since it uses as much as digits as its factorization.

81096131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 81096131 is about 9005.3390274881. The cubic root of 81096131 is about 432.8459699583.

The spelling of 81096131 in words is "eighty-one million, ninety-six thousand, one hundred thirty-one".