71082217 has 8 divisors (see below), whose sum is σ = 74006216. Its totient is φ = 68211072.

The previous prime is 71082149. The next prime is 71082299. The reversal of 71082217 is 71228017.

It can be written as a sum of positive squares in 4 ways, for example, as 31404816 + 39677401 = 5604^2 + 6299^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 71082217 - 2¹¹ = 71080169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71082017) 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, 10458 + ... + 15859.

It is an arithmetic number, because the mean of its divisors is an integer number (9250777).

Almost surely, 2^71082217 is an apocalyptic number.

It is an amenable number.

71082217 is a deficient number, since it is larger than the sum of its proper divisors (2923999).

71082217 is a wasteful number, since it uses less digits than its factorization.

71082217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26427.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 71082217 is about 8431.0270430120. The cubic root of 71082217 is about 414.2415469080.

The spelling of 71082217 in words is "seventy-one million, eighty-two thousand, two hundred seventeen".