71288216 has 16 divisors (see below), whose sum is σ = 133896840. Its totient is φ = 35582400.

The previous prime is 71288153. The next prime is 71288263. The reversal of 71288216 is 61288217.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2606 + ... + 12221.

Almost surely, 2^71288216 is an apocalyptic number.

It is an amenable number.

71288216 is a deficient number, since it is larger than the sum of its proper divisors (62608624).

71288216 is a wasteful number, since it uses less digits than its factorization.

71288216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15434 (or 15430 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 71288216 is about 8443.2349250746. The cubic root of 71288216 is about 414.6413236144.

Subtracting from 71288216 its reverse (61288217), we obtain a palindrome (9999999).

The spelling of 71288216 in words is "seventy-one million, two hundred eighty-eight thousand, two hundred sixteen".