71217316 has 6 divisors (see below), whose sum is σ = 124630310. Its totient is φ = 35608656.

The previous prime is 71217313. The next prime is 71217329. The reversal of 71217316 is 61371217.

It can be written as a sum of positive squares in only one way, i.e., 64866916 + 6350400 = 8054^2 + 2520^2 .

It is not an unprimeable number, because it can be changed into a prime (71217313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8902161 + ... + 8902168.

Almost surely, 2^71217316 is an apocalyptic number.

It is an amenable number.

71217316 is a deficient number, since it is larger than the sum of its proper divisors (53412994).

71217316 is a wasteful number, since it uses less digits than its factorization.

71217316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17804333 (or 17804331 counting only the distinct ones).

The product of its digits is 1764, while the sum is 28.

The square root of 71217316 is about 8439.0352529184. The cubic root of 71217316 is about 414.5038169180.

The spelling of 71217316 in words is "seventy-one million, two hundred seventeen thousand, three hundred sixteen".