13215132212520 has 256 divisors, whose sum is σ = 45375743139840. Its totient is φ = 3016157534208.

The previous prime is 13215132212507. The next prime is 13215132212587. The reversal of 13215132212520 is 2521223151231.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1954030659 + ... + 1954037421.

It is an arithmetic number, because the mean of its divisors is an integer number (177248996640).

Almost surely, 2^{13215132212520} is an apocalyptic number.

13215132212520 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 13215132212520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22687871569920).

13215132212520 is an abundant number, since it is smaller than the sum of its proper divisors (32160610927320).

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

13215132212520 is a wasteful number, since it uses less digits than its factorization.

13215132212520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9864 (or 9860 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 13215132212520 its reverse (2521223151231), we get a palindrome (15736355363751).

The spelling of 13215132212520 in words is "thirteen trillion, two hundred fifteen billion, one hundred thirty-two million, two hundred twelve thousand, five hundred twenty".