1312043215 has 16 divisors (see below), whose sum is σ = 1800152640. Its totient is φ = 899297280.

The previous prime is 1312043203. The next prime is 1312043231. The reversal of 1312043215 is 5123402131.

It is a happy number.

It is not a de Polignac number, because 1312043215 - 2⁷ = 1312043087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90895 + ... + 104335.

It is an arithmetic number, because the mean of its divisors is an integer number (112509540).

Almost surely, 2^1312043215 is an apocalyptic number.

1312043215 is a deficient number, since it is larger than the sum of its proper divisors (488109425).

1312043215 is a wasteful number, since it uses less digits than its factorization.

1312043215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16242.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1312043215 is about 36222.1370849374. The cubic root of 1312043215 is about 1094.7527544468.

Adding to 1312043215 its reverse (5123402131), we get a palindrome (6435445346).

The spelling of 1312043215 in words is "one billion, three hundred twelve million, forty-three thousand, two hundred fifteen".