71216018 has 8 divisors (see below), whose sum is σ = 107172912. Its totient is φ = 35491716.

The previous prime is 71216017. The next prime is 71216039. The reversal of 71216018 is 81061217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (71216017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57380 + ... + 58607.

It is an arithmetic number, because the mean of its divisors is an integer number (13396614).

Almost surely, 2^71216018 is an apocalyptic number.

71216018 is a deficient number, since it is larger than the sum of its proper divisors (35956894).

71216018 is a wasteful number, since it uses less digits than its factorization.

71216018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116296.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 71216018 is about 8438.9583480427. The cubic root of 71216018 is about 414.5012986670.

The spelling of 71216018 in words is "seventy-one million, two hundred sixteen thousand, eighteen".