1312217271 has 6 divisors (see below), whose sum is σ = 1895424960. Its totient is φ = 874811508.

The previous prime is 1312217251. The next prime is 1312217279. The reversal of 1312217271 is 1727122131.

It is not a de Polignac number, because 1312217271 - 2¹³ = 1312209079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312217279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72900951 + ... + 72900968.

It is an arithmetic number, because the mean of its divisors is an integer number (315904160).

Almost surely, 2^1312217271 is an apocalyptic number.

1312217271 is a deficient number, since it is larger than the sum of its proper divisors (583207689).

1312217271 is a wasteful number, since it uses less digits than its factorization.

1312217271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145801925 (or 145801922 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 1312217271 is about 36224.5396244038. The cubic root of 1312217271 is about 1094.8011623696.

The spelling of 1312217271 in words is "one billion, three hundred twelve million, two hundred seventeen thousand, two hundred seventy-one".