71814031 has 2 divisors, whose sum is σ = 71814032. Its totient is φ = 71814030.

The previous prime is 71814023. The next prime is 71814037. The reversal of 71814031 is 13041817.

It is a strong prime.

It is an emirp because it is prime and its reverse (13041817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71814031 - 2³ = 71814023 is a prime.

It is a super-2 number, since 2×71814031² = 10314510096937922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71813987 and 71814005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71814037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35907015 + 35907016.

It is an arithmetic number, because the mean of its divisors is an integer number (35907016).

Almost surely, 2^71814031 is an apocalyptic number.

71814031 is a deficient number, since it is larger than the sum of its proper divisors (1).

71814031 is an equidigital number, since it uses as much as digits as its factorization.

71814031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 71814031 is about 8474.3159605953. The cubic root of 71814031 is about 415.6582788361.

Adding to 71814031 its reverse (13041817), we get a palindrome (84855848).

The spelling of 71814031 in words is "seventy-one million, eight hundred fourteen thousand, thirty-one".