71255217 has 8 divisors (see below), whose sum is σ = 103644000. Its totient is φ = 43184960.

The previous prime is 71255213. The next prime is 71255273.

71255217 is nontrivially palindromic in base 10.

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 71255217 - 2² = 71255213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71255213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079592 + ... + 1079657.

It is an arithmetic number, because the mean of its divisors is an integer number (12955500).

Almost surely, 2^71255217 is an apocalyptic number.

It is an amenable number.

71255217 is a deficient number, since it is larger than the sum of its proper divisors (32388783).

71255217 is a wasteful number, since it uses less digits than its factorization.

71255217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159263.

The product of its digits is 4900, while the sum is 30.

The square root of 71255217 is about 8441.2805308200. The cubic root of 71255217 is about 414.5773351949.

The spelling of 71255217 in words is "seventy-one million, two hundred fifty-five thousand, two hundred seventeen".