13173520 has 40 divisors (see below), whose sum is σ = 31158720. Its totient is φ = 5178240.

The previous prime is 13173493. The next prime is 13173527. The reversal of 13173520 is 2537131.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 13173491 and 13173500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13173527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3325 + ... + 6115.

It is an arithmetic number, because the mean of its divisors is an integer number (778968).

Almost surely, 2^13173520 is an apocalyptic number.

13173520 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 13173520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15579360).

13173520 is an abundant number, since it is smaller than the sum of its proper divisors (17985200).

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

13173520 is a wasteful number, since it uses less digits than its factorization.

13173520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863 (or 2857 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 13173520 is about 3629.5344054024. The cubic root of 13173520 is about 236.1750114270.

The spelling of 13173520 in words is "thirteen million, one hundred seventy-three thousand, five hundred twenty".