71585481 has 16 divisors (see below), whose sum is σ = 104267520. Its totient is φ = 43325520.

The previous prime is 71585477. The next prime is 71585489. The reversal of 71585481 is 18458517.

It is not a de Polignac number, because 71585481 - 2² = 71585477 is a prime.

It is a super-2 number, since 2×71585481² = 10248962180002722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71585489) 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 15 ways as a sum of consecutive naturals, for example, 40686 + ... + 42408.

It is an arithmetic number, because the mean of its divisors is an integer number (6516720).

Almost surely, 2^71585481 is an apocalyptic number.

It is an amenable number.

71585481 is a deficient number, since it is larger than the sum of its proper divisors (32682039).

71585481 is a wasteful number, since it uses less digits than its factorization.

71585481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996.

The product of its digits is 44800, while the sum is 39.

The square root of 71585481 is about 8460.8203502970. The cubic root of 71585481 is about 415.2168625118.

The spelling of 71585481 in words is "seventy-one million, five hundred eighty-five thousand, four hundred eighty-one".