13153305521 has 4 divisors (see below), whose sum is σ = 13159462692. Its totient is φ = 13147148352.

The previous prime is 13153305509. The next prime is 13153305577. The reversal of 13153305521 is 12550335131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12550335131 = 83 ⋅151208857.

It can be written as a sum of positive squares in 2 ways, for example, as 6644043121 + 6509262400 = 81511^2 + 80680^2 .

It is a cyclic number.

It is not a de Polignac number, because 13153305521 - 2⁶ = 13153305457 is a prime.

It is a super-2 number, since 2×13153305521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13153305721) 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, 3075380 + ... + 3079653.

It is an arithmetic number, because the mean of its divisors is an integer number (3289865673).

Almost surely, 2^13153305521 is an apocalyptic number.

It is an amenable number.

13153305521 is a deficient number, since it is larger than the sum of its proper divisors (6157171).

13153305521 is an equidigital number, since it uses as much as digits as its factorization.

13153305521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157170.

The product of its (nonzero) digits is 6750, while the sum is 29.

The spelling of 13153305521 in words is "thirteen billion, one hundred fifty-three million, three hundred five thousand, five hundred twenty-one".