1310323531500 has 576 divisors, whose sum is σ = 4380015669120. Its totient is φ = 329358182400.

The previous prime is 1310323531499. The next prime is 1310323531511. The reversal of 1310323531500 is 51353230131.

1310323531500 is a `hidden beast` number, since 1 + 3 + 103 + 2 + 3 + 53 + 1 + 500 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 732432606 + ... + 732434394.

It is an arithmetic number, because the mean of its divisors is an integer number (7604193870).

Almost surely, 2^{1310323531500} is an apocalyptic number.

1310323531500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1310323531500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2190007834560).

1310323531500 is an abundant number, since it is smaller than the sum of its proper divisors (3069692137620).

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

1310323531500 is a wasteful number, since it uses less digits than its factorization.

1310323531500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987 (or 1972 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

Adding to 1310323531500 its reverse (51353230131), we get a palindrome (1361676761631).

The spelling of 1310323531500 in words is "one trillion, three hundred ten billion, three hundred twenty-three million, five hundred thirty-one thousand, five hundred".