13523530 has 16 divisors (see below), whose sum is σ = 24416640. Its totient is φ = 5392912.

The previous prime is 13523513. The next prime is 13523539. The reversal of 13523530 is 3532531.

It is a happy number.

13523530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13523539) 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, 1707 + ... + 5473.

It is an arithmetic number, because the mean of its divisors is an integer number (1526040).

Almost surely, 2^13523530 is an apocalyptic number.

13523530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13523530 is a deficient number, since it is larger than the sum of its proper divisors (10893110).

13523530 is a wasteful number, since it uses less digits than its factorization.

13523530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 13523530 is about 3677.4352475605. The cubic root of 13523530 is about 238.2484165617.

Subtracting from 13523530 its reverse (3532531), we obtain a palindrome (9990999).

The spelling of 13523530 in words is "thirteen million, five hundred twenty-three thousand, five hundred thirty".