71217797231 has 32 divisors (see below), whose sum is σ = 83404339200. Its totient is φ = 59551722720.

The previous prime is 71217797159. The next prime is 71217797263. The reversal of 71217797231 is 13279771217.

It is not a de Polignac number, because 71217797231 - 2¹⁰ = 71217796207 is a prime.

It is a super-2 number, since 2×71217797231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71217797291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65276996 + ... + 65278086.

It is an arithmetic number, because the mean of its divisors is an integer number (2606385600).

Almost surely, 2^71217797231 is an apocalyptic number.

71217797231 is a deficient number, since it is larger than the sum of its proper divisors (12186541969).

71217797231 is a wasteful number, since it uses less digits than its factorization.

71217797231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219.

The product of its digits is 259308, while the sum is 47.

The spelling of 71217797231 in words is "seventy-one billion, two hundred seventeen million, seven hundred ninety-seven thousand, two hundred thirty-one".