71008431 has 16 divisors (see below), whose sum is σ = 102619104. Its totient is φ = 43415424.

The previous prime is 71008411. The next prime is 71008451. The reversal of 71008431 is 13480017.

It is an interprime number because it is at equal distance from previous prime (71008411) and next prime (71008451).

It is not a de Polignac number, because 71008431 - 2⁹ = 71007919 is a prime.

It is a super-4 number, since 4×71008431⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71008411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325 + ... + 11921.

It is an arithmetic number, because the mean of its divisors is an integer number (6413694).

Almost surely, 2^71008431 is an apocalyptic number.

71008431 is a deficient number, since it is larger than the sum of its proper divisors (31610673).

71008431 is a wasteful number, since it uses less digits than its factorization.

71008431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11770.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 71008431 is about 8426.6500461334. The cubic root of 71008431 is about 414.0981645445.

Adding to 71008431 its reverse (13480017), we get a palindrome (84488448).

The spelling of 71008431 in words is "seventy-one million, eight thousand, four hundred thirty-one".