1311242324531 has 16 divisors (see below), whose sum is σ = 1433585329920. Its totient is φ = 1193946378240.

The previous prime is 1311242324507. The next prime is 1311242324533. The reversal of 1311242324531 is 1354232421131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1311242324531 - 2¹⁸ = 1311242062387 is a prime.

It is a super-2 number, since 2×1311242324531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311242324533) 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, 1418915 + ... + 2153091.

It is an arithmetic number, because the mean of its divisors is an integer number (89599083120).

Almost surely, 2^{1311242324531} is an apocalyptic number.

1311242324531 is a deficient number, since it is larger than the sum of its proper divisors (122343005389).

1311242324531 is a wasteful number, since it uses less digits than its factorization.

1311242324531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737614.

The product of its digits is 17280, while the sum is 32.

Adding to 1311242324531 its reverse (1354232421131), we get a palindrome (2665474745662).

The spelling of 1311242324531 in words is "one trillion, three hundred eleven billion, two hundred forty-two million, three hundred twenty-four thousand, five hundred thirty-one".