13522500 has 90 divisors (see below), whose sum is σ = 42784742. Its totient is φ = 3600000.

The previous prime is 13522499. The next prime is 13522549. The reversal of 13522500 is 522531.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 2985984 + 10536516 = 1728^2 + 3246^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 22200 + ... + 22800.

Almost surely, 2^13522500 is an apocalyptic number.

13522500 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 13522500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21392371).

13522500 is an abundant number, since it is smaller than the sum of its proper divisors (29262242).

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

13522500 is a wasteful number, since it uses less digits than its factorization.

13522500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 13522500 is about 3677.2952016394. The cubic root of 13522500 is about 238.2423677934.

The spelling of 13522500 in words is "thirteen million, five hundred twenty-two thousand, five hundred".