1311232523635 has 32 divisors (see below), whose sum is σ = 1646797666752. Its totient is φ = 1001194421760.

The previous prime is 1311232523621. The next prime is 1311232523639. The reversal of 1311232523635 is 5363252321131.

It is not a de Polignac number, because 1311232523635 - 2¹³ = 1311232515443 is a prime.

It is a super-2 number, since 2×1311232523635² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311232523594 and 1311232523603.

It is not an unprimeable number, because it can be changed into a prime (1311232523639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80598772 + ... + 80615038.

It is an arithmetic number, because the mean of its divisors is an integer number (51462427086).

Almost surely, 2^{1311232523635} is an apocalyptic number.

1311232523635 is a deficient number, since it is larger than the sum of its proper divisors (335565143117).

1311232523635 is a wasteful number, since it uses less digits than its factorization.

1311232523635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24583.

The product of its digits is 97200, while the sum is 37.

Adding to 1311232523635 its reverse (5363252321131), we get a palindrome (6674484844766).

The spelling of 1311232523635 in words is "one trillion, three hundred eleven billion, two hundred thirty-two million, five hundred twenty-three thousand, six hundred thirty-five".