71297516 has 24 divisors (see below), whose sum is σ = 131501664. Its totient is φ = 33756800.

The previous prime is 71297509. The next prime is 71297531. The reversal of 71297516 is 61579217.

It is a self number, because there is not a number n which added to its sum of digits gives 71297516.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5456 + ... + 13128.

It is an arithmetic number, because the mean of its divisors is an integer number (5479236).

Almost surely, 2^71297516 is an apocalyptic number.

It is an amenable number.

71297516 is a deficient number, since it is larger than the sum of its proper divisors (60204148).

71297516 is a wasteful number, since it uses less digits than its factorization.

71297516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7801 (or 7799 counting only the distinct ones).

The product of its digits is 26460, while the sum is 38.

The square root of 71297516 is about 8443.7856438922. The cubic root of 71297516 is about 414.6593536940.

The spelling of 71297516 in words is "seventy-one million, two hundred ninety-seven thousand, five hundred sixteen".