71229131 has 2 divisors, whose sum is σ = 71229132. Its totient is φ = 71229130.

The previous prime is 71229121. The next prime is 71229149. The reversal of 71229131 is 13192217.

It is a weak prime.

It is an emirp because it is prime and its reverse (13192217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71229131 - 2¹⁰ = 71228107 is a prime.

It is a super-2 number, since 2×71229131² = 10147178206030322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71229131.

It is not a weakly prime, because it can be changed into another prime (71229101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35614565 + 35614566.

It is an arithmetic number, because the mean of its divisors is an integer number (35614566).

Almost surely, 2^71229131 is an apocalyptic number.

71229131 is a deficient number, since it is larger than the sum of its proper divisors (1).

71229131 is an equidigital number, since it uses as much as digits as its factorization.

71229131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 26.

The square root of 71229131 is about 8439.7352446626. The cubic root of 71229131 is about 414.5267378033.

The spelling of 71229131 in words is "seventy-one million, two hundred twenty-nine thousand, one hundred thirty-one".