1312531343 has 8 divisors (see below), whose sum is σ = 1381995120. Its totient is φ = 1243105920.

The previous prime is 1312531331. The next prime is 1312531397. The reversal of 1312531343 is 3431352131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312531343 - 2⁶ = 1312531279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312531243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84353 + ... + 98693.

It is an arithmetic number, because the mean of its divisors is an integer number (172749390).

Almost surely, 2^1312531343 is an apocalyptic number.

1312531343 is a deficient number, since it is larger than the sum of its proper divisors (69463777).

1312531343 is a wasteful number, since it uses less digits than its factorization.

1312531343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19177.

The product of its digits is 3240, while the sum is 26.

The square root of 1312531343 is about 36228.8744373876. The cubic root of 1312531343 is about 1094.8885002847. Note that the first 3 decimals are identical.

Adding to 1312531343 its reverse (3431352131), we get a palindrome (4743883474).

The spelling of 1312531343 in words is "one billion, three hundred twelve million, five hundred thirty-one thousand, three hundred forty-three".