13153561 has 4 divisors (see below), whose sum is σ = 13433472. Its totient is φ = 12873652.

The previous prime is 13153541. The next prime is 13153583. The reversal of 13153561 is 16535131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16535131 = 67 ⋅246793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13153561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13153541) 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 3 ways as a sum of consecutive naturals, for example, 139885 + ... + 139978.

It is an arithmetic number, because the mean of its divisors is an integer number (3358368).

Almost surely, 2^13153561 is an apocalyptic number.

It is an amenable number.

13153561 is a deficient number, since it is larger than the sum of its proper divisors (279911).

13153561 is an equidigital number, since it uses as much as digits as its factorization.

13153561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279910.

The product of its digits is 1350, while the sum is 25.

The square root of 13153561 is about 3626.7838369553. The cubic root of 13153561 is about 236.0556760818.

Adding to 13153561 its reverse (16535131), we get a palindrome (29688692).

The spelling of 13153561 in words is "thirteen million, one hundred fifty-three thousand, five hundred sixty-one".