1312232313 has 16 divisors (see below), whose sum is σ = 2000141696. Its totient is φ = 749640960.

The previous prime is 1312232297. The next prime is 1312232357. The reversal of 1312232313 is 3132322131.

It is not a de Polignac number, because 1312232313 - 2⁴ = 1312232297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1312232313.

It is not an unprimeable number, because it can be changed into a prime (1312232113) 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 15 ways as a sum of consecutive naturals, for example, 103923 + ... + 115863.

It is an arithmetic number, because the mean of its divisors is an integer number (125008856).

Almost surely, 2^1312232313 is an apocalyptic number.

It is an amenable number.

1312232313 is a deficient number, since it is larger than the sum of its proper divisors (687909383).

1312232313 is a wasteful number, since it uses less digits than its factorization.

1312232313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17184.

The product of its digits is 648, while the sum is 21.

The square root of 1312232313 is about 36224.7472454950. The cubic root of 1312232313 is about 1094.8053456038.

Adding to 1312232313 its reverse (3132322131), we get a palindrome (4444554444).

The spelling of 1312232313 in words is "one billion, three hundred twelve million, two hundred thirty-two thousand, three hundred thirteen".