71057047531 has 2 divisors, whose sum is σ = 71057047532. Its totient is φ = 71057047530.

The previous prime is 71057047519. The next prime is 71057047553. The reversal of 71057047531 is 13574075017.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71057047531 - 2¹⁷ = 71056916459 is a prime.

It is a super-2 number, since 2×71057047531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71057047591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35528523765 + 35528523766.

It is an arithmetic number, because the mean of its divisors is an integer number (35528523766).

Almost surely, 2^71057047531 is an apocalyptic number.

71057047531 is a deficient number, since it is larger than the sum of its proper divisors (1).

71057047531 is an equidigital number, since it uses as much as digits as its factorization.

71057047531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102900, while the sum is 40.

The spelling of 71057047531 in words is "seventy-one billion, fifty-seven million, forty-seven thousand, five hundred thirty-one".