71385216 has 64 divisors (see below), whose sum is σ = 216713280. Its totient is φ = 20395008.

The previous prime is 71385191. The next prime is 71385233. The reversal of 71385216 is 61258317.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10591 + ... + 15966.

It is an arithmetic number, because the mean of its divisors is an integer number (3386145).

Almost surely, 2^71385216 is an apocalyptic number.

It is an amenable number.

71385216 is an abundant number, since it is smaller than the sum of its proper divisors (145328064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71385216 is a wasteful number, since it uses less digits than its factorization.

71385216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26581 (or 26569 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 71385216 is about 8448.9772162079. The cubic root of 71385216 is about 414.8293022277.

The spelling of 71385216 in words is "seventy-one million, three hundred eighty-five thousand, two hundred sixteen".