71008481 has 4 divisors (see below), whose sum is σ = 71303364. Its totient is φ = 70713600.

The previous prime is 71008471. The next prime is 71008489. The reversal of 71008481 is 18480017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18480017 = 23 ⋅803479.

It can be written as a sum of positive squares in 2 ways, for example, as 31820881 + 39187600 = 5641^2 + 6260^2 .

It is a cyclic number.

It is not a de Polignac number, because 71008481 - 2¹⁸ = 70746337 is a prime.

It is a super-2 number, since 2×71008481² = 10084408747854722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71008489) 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, 147080 + ... + 147561.

It is an arithmetic number, because the mean of its divisors is an integer number (17825841).

Almost surely, 2^71008481 is an apocalyptic number.

It is an amenable number.

71008481 is a deficient number, since it is larger than the sum of its proper divisors (294883).

71008481 is a wasteful number, since it uses less digits than its factorization.

71008481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294882.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 71008481 is about 8426.6530129109. The cubic root of 71008481 is about 414.0982617391.

Adding to 71008481 its reverse (18480017), we get a palindrome (89488498).

The spelling of 71008481 in words is "seventy-one million, eight thousand, four hundred eighty-one".