13117553 has 4 divisors (see below), whose sum is σ = 13365108. Its totient is φ = 12870000.

The previous prime is 13117549. The next prime is 13117561. The reversal of 13117553 is 35571131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7491169 + 5626384 = 2737^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 13117553 - 2² = 13117549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13117453) 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, 123698 + ... + 123803.

It is an arithmetic number, because the mean of its divisors is an integer number (3341277).

Almost surely, 2^13117553 is an apocalyptic number.

It is an amenable number.

13117553 is a deficient number, since it is larger than the sum of its proper divisors (247555).

13117553 is an equidigital number, since it uses as much as digits as its factorization.

13117553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247554.

The product of its digits is 1575, while the sum is 26.

The square root of 13117553 is about 3621.8162570732. The cubic root of 13117553 is about 235.8400776650.

Adding to 13117553 its reverse (35571131), we get a palindrome (48688684).

The spelling of 13117553 in words is "thirteen million, one hundred seventeen thousand, five hundred fifty-three".