1312217268 has 24 divisors (see below), whose sum is σ = 3083871840. Its totient is φ = 434258400.

The previous prime is 1312217251. The next prime is 1312217279. The reversal of 1312217268 is 8627122131.

1312217268 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391683 + ... + 395018.

It is an arithmetic number, because the mean of its divisors is an integer number (128494660).

Almost surely, 2^1312217268 is an apocalyptic number.

It is an amenable number.

1312217268 is an abundant number, since it is smaller than the sum of its proper divisors (1771654572).

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

1312217268 is a wasteful number, since it uses less digits than its factorization.

1312217268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786847 (or 786845 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 1312217268 is about 36224.5395829954. The cubic root of 1312217268 is about 1094.8011615353.

Adding to 1312217268 its reverse (8627122131), we get a palindrome (9939339399).

The spelling of 1312217268 in words is "one billion, three hundred twelve million, two hundred seventeen thousand, two hundred sixty-eight".