13530553 has 4 divisors (see below), whose sum is σ = 13547520. Its totient is φ = 13513588.

The previous prime is 13530523. The next prime is 13530557. The reversal of 13530553 is 35503531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13530553 - 2¹⁷ = 13399481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13530557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7225 + ... + 8902.

It is an arithmetic number, because the mean of its divisors is an integer number (3386880).

Almost surely, 2^13530553 is an apocalyptic number.

It is an amenable number.

13530553 is a deficient number, since it is larger than the sum of its proper divisors (16967).

13530553 is an equidigital number, since it uses as much as digits as its factorization.

13530553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16966.

The product of its (nonzero) digits is 3375, while the sum is 25.

The square root of 13530553 is about 3678.3900010738. The cubic root of 13530553 is about 238.2896515812.

The spelling of 13530553 in words is "thirteen million, five hundred thirty thousand, five hundred fifty-three".