71201718 has 48 divisors (see below), whose sum is σ = 178747296. Its totient is φ = 20062080.

The previous prime is 71201717. The next prime is 71201719. The reversal of 71201718 is 81710217.

It is an interprime number because it is at equal distance from previous prime (71201717) and next prime (71201719).

It is a junction number, because it is equal to n+sod(n) for n = 71201691 and 71201700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71201717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5328 + ... + 13068.

It is an arithmetic number, because the mean of its divisors is an integer number (3723902).

Almost surely, 2^71201718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71201718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89373648).

71201718 is an abundant number, since it is smaller than the sum of its proper divisors (107545578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71201718 is a wasteful number, since it uses less digits than its factorization.

71201718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7829 (or 7826 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 71201718 is about 8438.1110445407. Note that the first 3 decimals coincide. The cubic root of 71201718 is about 414.4735531985.

The spelling of 71201718 in words is "seventy-one million, two hundred one thousand, seven hundred eighteen".