13425131520 has 360 divisors, whose sum is σ = 47231664480. Its totient is φ = 3527147520.

The previous prime is 13425131509. The next prime is 13425131521. The reversal of 13425131520 is 2513152431.

13425131520 is a `hidden beast` number, since 1 + 3 + 4 + 2 + 5 + 131 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13425131521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96583611 + ... + 96583749.

It is an arithmetic number, because the mean of its divisors is an integer number (131199068).

Almost surely, 2^13425131520 is an apocalyptic number.

13425131520 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 13425131520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23615832240).

13425131520 is an abundant number, since it is smaller than the sum of its proper divisors (33806532960).

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

13425131520 is a wasteful number, since it uses less digits than its factorization.

13425131520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 13425131520 its reverse (2513152431), we get a palindrome (15938283951).

The spelling of 13425131520 in words is "thirteen billion, four hundred twenty-five million, one hundred thirty-one thousand, five hundred twenty".