71213431217 has 4 divisors (see below), whose sum is σ = 71222032896. Its totient is φ = 71204829540.

The previous prime is 71213431187. The next prime is 71213431253.

71213431217 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71213431217 - 2¹² = 71213427121 is a prime.

It is a super-5 number, since 5×71213431217⁵ (a number of 55 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71213434217) 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 3 ways as a sum of consecutive naturals, for example, 4288409 + ... + 4304982.

It is an arithmetic number, because the mean of its divisors is an integer number (17805508224).

Almost surely, 2^71213431217 is an apocalyptic number.

It is an amenable number.

71213431217 is a deficient number, since it is larger than the sum of its proper divisors (8601679).

71213431217 is an equidigital number, since it uses as much as digits as its factorization.

71213431217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8601678.

The product of its digits is 7056, while the sum is 32.

The spelling of 71213431217 in words is "seventy-one billion, two hundred thirteen million, four hundred thirty-one thousand, two hundred seventeen".