1313112500 has 144 divisors (see below), whose sum is σ = 3368534400. Its totient is φ = 438480000.

The previous prime is 1313112491. The next prime is 1313112503. The reversal of 1313112500 is 52113131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313112503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3762326 + ... + 3762674.

It is an arithmetic number, because the mean of its divisors is an integer number (23392600).

Almost surely, 2^1313112500 is an apocalyptic number.

1313112500 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 1313112500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1684267200).

1313112500 is an abundant number, since it is smaller than the sum of its proper divisors (2055421900).

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

1313112500 is an equidigital number, since it uses as much as digits as its factorization.

1313112500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1313112500 is about 36236.8941825869. The cubic root of 1313112500 is about 1095.0500731187.

Adding to 1313112500 its reverse (52113131), we get a palindrome (1365225631).

The spelling of 1313112500 in words is "one billion, three hundred thirteen million, one hundred twelve thousand, five hundred".