1312143215 has 32 divisors (see below), whose sum is σ = 1750533120. Its totient is φ = 939119104.

The previous prime is 1312143197. The next prime is 1312143223. The reversal of 1312143215 is 5123412131.

It is a cyclic number.

It is not a de Polignac number, because 1312143215 - 2¹² = 1312139119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324476 + ... + 328494.

It is an arithmetic number, because the mean of its divisors is an integer number (54704160).

Almost surely, 2^1312143215 is an apocalyptic number.

1312143215 is a deficient number, since it is larger than the sum of its proper divisors (438389905).

1312143215 is a wasteful number, since it uses less digits than its factorization.

1312143215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231.

The product of its digits is 720, while the sum is 23.

The square root of 1312143215 is about 36223.5174299791. The cubic root of 1312143215 is about 1094.7805666645.

Adding to 1312143215 its reverse (5123412131), we get a palindrome (6435555346).

The spelling of 1312143215 in words is "one billion, three hundred twelve million, one hundred forty-three thousand, two hundred fifteen".