1311433236552 has 64 divisors (see below), whose sum is σ = 3285008400960. Its totient is φ = 436288032000.

The previous prime is 1311433236551. The next prime is 1311433236557. The reversal of 1311433236552 is 2556323341131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311433236552.

It is not an unprimeable number, because it can be changed into a prime (1311433236551) 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, 111010198 + ... + 111022010.

It is an arithmetic number, because the mean of its divisors is an integer number (51328256265).

Almost surely, 2^{1311433236552} is an apocalyptic number.

1311433236552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311433236552 is an abundant number, since it is smaller than the sum of its proper divisors (1973575164408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311433236552 is a wasteful number, since it uses less digits than its factorization.

1311433236552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20494 (or 20490 counting only the distinct ones).

The product of its digits is 194400, while the sum is 39.

Adding to 1311433236552 its reverse (2556323341131), we get a palindrome (3867756577683).

The spelling of 1311433236552 in words is "one trillion, three hundred eleven billion, four hundred thirty-three million, two hundred thirty-six thousand, five hundred fifty-two".