13522520 has 64 divisors (see below), whose sum is σ = 33726240. Its totient is φ = 4838400.

The previous prime is 13522499. The next prime is 13522549. The reversal of 13522520 is 2522531.

13522520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13522492 and 13522501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31910 + ... + 32330.

Almost surely, 2^13522520 is an apocalyptic number.

13522520 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 13522520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16863120).

13522520 is an abundant number, since it is smaller than the sum of its proper divisors (20203720).

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

13522520 is a wasteful number, since it uses less digits than its factorization.

13522520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 13522520 is about 3677.2979210284. The cubic root of 13522520 is about 238.2424852481.

The spelling of 13522520 in words is "thirteen million, five hundred twenty-two thousand, five hundred twenty".