13103513 has 4 divisors (see below), whose sum is σ = 13457700. Its totient is φ = 12749328.

The previous prime is 13103509. The next prime is 13103533. The reversal of 13103513 is 31530131.

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 12306064 + 797449 = 3508^2 + 893^2 .

It is a cyclic number.

It is not a de Polignac number, because 13103513 - 2² = 13103509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13103491 and 13103500.

It is not an unprimeable number, because it can be changed into a prime (13103533) 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, 177038 + ... + 177111.

It is an arithmetic number, because the mean of its divisors is an integer number (3364425).

Almost surely, 2^13103513 is an apocalyptic number.

It is an amenable number.

13103513 is a deficient number, since it is larger than the sum of its proper divisors (354187).

13103513 is an equidigital number, since it uses as much as digits as its factorization.

13103513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354186.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 13103513 is about 3619.8774841146. The cubic root of 13103513 is about 235.7559060530.

Adding to 13103513 its reverse (31530131), we get a palindrome (44633644).

The spelling of 13103513 in words is "thirteen million, one hundred three thousand, five hundred thirteen".