13155061521 has 16 divisors (see below), whose sum is σ = 21100851200. Its totient is φ = 7121536848.

The previous prime is 13155061487. The next prime is 13155061561. The reversal of 13155061521 is 12516055131.

It is not a de Polignac number, because 13155061521 - 2⁶ = 13155061457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13155061561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16484641 + ... + 16485438.

It is an arithmetic number, because the mean of its divisors is an integer number (1318803200).

Almost surely, 2^13155061521 is an apocalyptic number.

It is an amenable number.

13155061521 is a deficient number, since it is larger than the sum of its proper divisors (7945789679).

13155061521 is a wasteful number, since it uses less digits than its factorization.

13155061521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32970108.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 13155061521 in words is "thirteen billion, one hundred fifty-five million, sixty-one thousand, five hundred twenty-one".