13145212500 has 144 divisors (see below), whose sum is σ = 43815445632. Its totient is φ = 3004560000.

The previous prime is 13145212469. The next prime is 13145212543. The reversal of 13145212500 is 521254131.

It is a happy number.

It is a super-2 number, since 2×13145212500² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 237462 + ... + 287538.

It is an arithmetic number, because the mean of its divisors is an integer number (304273928).

Almost surely, 2^13145212500 is an apocalyptic number.

13145212500 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 13145212500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21907722816).

13145212500 is an abundant number, since it is smaller than the sum of its proper divisors (30670233132).

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

13145212500 is an equidigital number, since it uses as much as digits as its factorization.

13145212500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50116 (or 50094 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 13145212500 its reverse (521254131), we get a palindrome (13666466631).

The spelling of 13145212500 in words is "thirteen billion, one hundred forty-five million, two hundred twelve thousand, five hundred".