71587331 has 2 divisors, whose sum is σ = 71587332. Its totient is φ = 71587330.

The previous prime is 71587301. The next prime is 71587333. The reversal of 71587331 is 13378517.

It is a strong prime.

It is an emirp because it is prime and its reverse (13378517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71587331 - 2¹⁸ = 71325187 is a prime.

It is a super-2 number, since 2×71587331² = 10249491919407122, which contains 22 as substring.

Together with 71587333, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71587291 and 71587300.

It is not a weakly prime, because it can be changed into another prime (71587333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35793665 + 35793666.

It is an arithmetic number, because the mean of its divisors is an integer number (35793666).

Almost surely, 2^71587331 is an apocalyptic number.

71587331 is a deficient number, since it is larger than the sum of its proper divisors (1).

71587331 is an equidigital number, since it uses as much as digits as its factorization.

71587331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 35.

The square root of 71587331 is about 8460.9296770509. The cubic root of 71587331 is about 415.2204393291.

The spelling of 71587331 in words is "seventy-one million, five hundred eighty-seven thousand, three hundred thirty-one".