71585081 has 8 divisors (see below), whose sum is σ = 72534528. Its totient is φ = 70642000.

The previous prime is 71585071. The next prime is 71585099. The reversal of 71585081 is 18058517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71585081 - 2¹⁴ = 71568697 is a prime.

It is a super-2 number, since 2×71585081² = 10248847643553122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71585071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23591 + ... + 26451.

It is an arithmetic number, because the mean of its divisors is an integer number (9066816).

Almost surely, 2^71585081 is an apocalyptic number.

It is an amenable number.

71585081 is a deficient number, since it is larger than the sum of its proper divisors (949447).

71585081 is a wasteful number, since it uses less digits than its factorization.

71585081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183.

The product of its (nonzero) digits is 11200, while the sum is 35.

The square root of 71585081 is about 8460.7967118942. The cubic root of 71585081 is about 415.2160891377.

The spelling of 71585081 in words is "seventy-one million, five hundred eighty-five thousand, eighty-one".