71530871 has 2 divisors, whose sum is σ = 71530872. Its totient is φ = 71530870.

The previous prime is 71530859. The next prime is 71530873. The reversal of 71530871 is 17803517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71530871 - 2¹⁰ = 71529847 is a prime.

Together with 71530873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71530873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35765435 + 35765436.

It is an arithmetic number, because the mean of its divisors is an integer number (35765436).

Almost surely, 2^71530871 is an apocalyptic number.

71530871 is a deficient number, since it is larger than the sum of its proper divisors (1).

71530871 is an equidigital number, since it uses as much as digits as its factorization.

71530871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 71530871 is about 8457.5925061450. The cubic root of 71530871 is about 415.1112509596. Note that the first 3 decimals are identical.

The spelling of 71530871 in words is "seventy-one million, five hundred thirty thousand, eight hundred seventy-one".