71813516 has 24 divisors (see below), whose sum is σ = 129018960. Its totient is φ = 34961472.

The previous prime is 71813513. The next prime is 71813537. The reversal of 71813516 is 61531817.

It is not an unprimeable number, because it can be changed into a prime (71813513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28250 + ... + 30686.

It is an arithmetic number, because the mean of its divisors is an integer number (5375790).

Almost surely, 2^71813516 is an apocalyptic number.

It is an amenable number.

71813516 is a deficient number, since it is larger than the sum of its proper divisors (57205444).

71813516 is a wasteful number, since it uses less digits than its factorization.

71813516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633 (or 2631 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 71813516 is about 8474.2855746075. The cubic root of 71813516 is about 415.6572852302.

The spelling of 71813516 in words is "seventy-one million, eight hundred thirteen thousand, five hundred sixteen".