71512144312 has 16 divisors (see below), whose sum is σ = 153240309360. Its totient is φ = 30648061824.

The previous prime is 71512144259. The next prime is 71512144313. The reversal of 71512144312 is 21344121517.

It is a super-2 number, since 2×71512144312² (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 (71512144313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638501233 + ... + 638501344.

It is an arithmetic number, because the mean of its divisors is an integer number (9577519335).

Almost surely, 2^71512144312 is an apocalyptic number.

It is an amenable number.

71512144312 is an abundant number, since it is smaller than the sum of its proper divisors (81728165048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71512144312 is a wasteful number, since it uses less digits than its factorization.

71512144312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277002590 (or 1277002586 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

Adding to 71512144312 its reverse (21344121517), we get a palindrome (92856265829).

The spelling of 71512144312 in words is "seventy-one billion, five hundred twelve million, one hundred forty-four thousand, three hundred twelve".