71270217 has 6 divisors (see below), whose sum is σ = 102945882. Its totient is φ = 47513472.

The previous prime is 71270201. The next prime is 71270231. The reversal of 71270217 is 71207217.

It can be written as a sum of positive squares in only one way, i.e., 61214976 + 10055241 = 7824^2 + 3171^2 .

It is not a de Polignac number, because 71270217 - 2⁴ = 71270201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71270237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3959448 + ... + 3959465.

It is an arithmetic number, because the mean of its divisors is an integer number (17157647).

Almost surely, 2^71270217 is an apocalyptic number.

It is an amenable number.

71270217 is a deficient number, since it is larger than the sum of its proper divisors (31675665).

71270217 is a wasteful number, since it uses less digits than its factorization.

71270217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7918919 (or 7918916 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 71270217 is about 8442.1689748547. The cubic root of 71270217 is about 414.6064241700.

The spelling of 71270217 in words is "seventy-one million, two hundred seventy thousand, two hundred seventeen".