71715481 has 4 divisors (see below), whose sum is σ = 75490000. Its totient is φ = 67940964.

The previous prime is 71715473. The next prime is 71715491. The reversal of 71715481 is 18451717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18451717 = 19 ⋅971143.

It is a cyclic number.

It is not a de Polignac number, because 71715481 - 2³ = 71715473 is a prime.

It is a super-2 number, since 2×71715481² = 10286220430122722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71715451) 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 3 ways as a sum of consecutive naturals, for example, 1887231 + ... + 1887268.

It is an arithmetic number, because the mean of its divisors is an integer number (18872500).

Almost surely, 2^71715481 is an apocalyptic number.

It is an amenable number.

71715481 is a deficient number, since it is larger than the sum of its proper divisors (3774519).

71715481 is a wasteful number, since it uses less digits than its factorization.

71715481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774518.

The product of its digits is 7840, while the sum is 34.

The square root of 71715481 is about 8468.4993357737. The cubic root of 71715481 is about 415.4680566054.

The spelling of 71715481 in words is "seventy-one million, seven hundred fifteen thousand, four hundred eighty-one".