1312543011 has 16 divisors (see below), whose sum is σ = 1901973920. Its totient is φ = 800305920.

The previous prime is 1312543003. The next prime is 1312543031. The reversal of 1312543011 is 1103452131.

It is not a de Polignac number, because 1312543011 - 2³ = 1312543003 is a prime.

It is a super-2 number, since 2×1312543011² = 3445538311449892242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312543031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150130 + ... + 158631.

It is an arithmetic number, because the mean of its divisors is an integer number (118873370).

Almost surely, 2^1312543011 is an apocalyptic number.

1312543011 is a deficient number, since it is larger than the sum of its proper divisors (589430909).

1312543011 is a wasteful number, since it uses less digits than its factorization.

1312543011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308886.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1312543011 is about 36229.0354688060. The cubic root of 1312543011 is about 1094.8917446825.

Adding to 1312543011 its reverse (1103452131), we get a palindrome (2415995142).

The spelling of 1312543011 in words is "one billion, three hundred twelve million, five hundred forty-three thousand, eleven".