71112131 has 2 divisors, whose sum is σ = 71112132. Its totient is φ = 71112130.

The previous prime is 71112121. The next prime is 71112161. The reversal of 71112131 is 13121117.

It is a weak prime.

It is an emirp because it is prime and its reverse (13121117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71112131 - 2²² = 66917827 is a prime.

It is a super-2 number, since 2×71112131² = 10113870350722322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71112101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35556065 + 35556066.

It is an arithmetic number, because the mean of its divisors is an integer number (35556066).

Almost surely, 2^71112131 is an apocalyptic number.

71112131 is a deficient number, since it is larger than the sum of its proper divisors (1).

71112131 is an equidigital number, since it uses as much as digits as its factorization.

71112131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42, while the sum is 17.

The square root of 71112131 is about 8432.8008988710. The cubic root of 71112131 is about 414.2996480960.

Adding to 71112131 its reverse (13121117), we get a palindrome (84233248).

The spelling of 71112131 in words is "seventy-one million, one hundred twelve thousand, one hundred thirty-one".