13013553 has 8 divisors (see below), whose sum is σ = 19830208. Its totient is φ = 7436304.

The previous prime is 13013549. The next prime is 13013593. The reversal of 13013553 is 35531031.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13013553 - 2² = 13013549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 619693 = 13013553 / (1 + 3 + 0 + 1 + 3 + 5 + 5 + 3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13013513) 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, 309826 + ... + 309867.

It is an arithmetic number, because the mean of its divisors is an integer number (2478776).

Almost surely, 2^13013553 is an apocalyptic number.

It is an amenable number.

13013553 is a deficient number, since it is larger than the sum of its proper divisors (6816655).

13013553 is an equidigital number, since it uses as much as digits as its factorization.

13013553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619703.

The product of its (nonzero) digits is 675, while the sum is 21.

The square root of 13013553 is about 3607.4302488059. The cubic root of 13013553 is about 235.2151522875.

Adding to 13013553 its reverse (35531031), we get a palindrome (48544584).

The spelling of 13013553 in words is "thirteen million, thirteen thousand, five hundred fifty-three".