13013561 has 8 divisors (see below), whose sum is σ = 14814144. Its totient is φ = 11315920.

The previous prime is 13013549. The next prime is 13013593. The reversal of 13013561 is 16531031.

It is a happy number.

13013561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-13013561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13013261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25466 + ... + 25971.

It is an arithmetic number, because the mean of its divisors is an integer number (1851768).

Almost surely, 2^13013561 is an apocalyptic number.

13013561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13013561 is a deficient number, since it is larger than the sum of its proper divisors (1800583).

13013561 is a wasteful number, since it uses less digits than its factorization.

13013561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51471.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 13013561 is about 3607.4313576283. The cubic root of 13013561 is about 235.2152004865.

Adding to 13013561 its reverse (16531031), we get a palindrome (29544592).

The spelling of 13013561 in words is "thirteen million, thirteen thousand, five hundred sixty-one".