13515560 has 32 divisors (see below), whose sum is σ = 30844800. Its totient is φ = 5328960.

The previous prime is 13515553. The next prime is 13515563. The reversal of 13515560 is 6551531.

13515560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13515560² = 365340724227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13515563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461 + ... + 5219.

It is an arithmetic number, because the mean of its divisors is an integer number (963900).

Almost surely, 2^13515560 is an apocalyptic number.

13515560 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 13515560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15422400).

13515560 is an abundant number, since it is smaller than the sum of its proper divisors (17329240).

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

13515560 is a wasteful number, since it uses less digits than its factorization.

13515560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4841 (or 4837 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 13515560 is about 3676.3514521873. The cubic root of 13515560 is about 238.2016040055.

The spelling of 13515560 in words is "thirteen million, five hundred fifteen thousand, five hundred sixty".