71718530 has 24 divisors (see below), whose sum is σ = 139790772. Its totient is φ = 26480064.

The previous prime is 71718527. The next prime is 71718547. The reversal of 71718530 is 3581717.

It can be written as a sum of positive squares in 6 ways, for example, as 30591961 + 41126569 = 5531^2 + 6413^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19529 + ... + 22908.

Almost surely, 2^71718530 is an apocalyptic number.

71718530 is a deficient number, since it is larger than the sum of its proper divisors (68072242).

71718530 is a wasteful number, since it uses less digits than its factorization.

71718530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42470 (or 42457 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 71718530 is about 8468.6793539489. The cubic root of 71718530 is about 415.4739444283.

The spelling of 71718530 in words is "seventy-one million, seven hundred eighteen thousand, five hundred thirty".