13131211530 has 128 divisors (see below), whose sum is σ = 32480937216. Its totient is φ = 3396556800.

The previous prime is 13131211529. The next prime is 13131211531. The reversal of 13131211530 is 3511213131.

It is an interprime number because it is at equal distance from previous prime (13131211529) and next prime (13131211531).

It is a junction number, because it is equal to n+sod(n) for n = 13131211497 and 13131211506.

It is not an unprimeable number, because it can be changed into a prime (13131211531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62233125 + ... + 62233335.

It is an arithmetic number, because the mean of its divisors is an integer number (253757322).

Almost surely, 2^13131211530 is an apocalyptic number.

13131211530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13131211530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16240468608).

13131211530 is an abundant number, since it is smaller than the sum of its proper divisors (19349725686).

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

13131211530 is a wasteful number, since it uses less digits than its factorization.

13131211530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632.

The product of its (nonzero) digits is 270, while the sum is 21.

Adding to 13131211530 its reverse (3511213131), we get a palindrome (16642424661).

The spelling of 13131211530 in words is "thirteen billion, one hundred thirty-one million, two hundred eleven thousand, five hundred thirty".