13555520201 has 4 divisors (see below), whose sum is σ = 13641861252. Its totient is φ = 13469179152.

The previous prime is 13555520179. The next prime is 13555520203. The reversal of 13555520201 is 10202555531.

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 4332798976 + 9222721225 = 65824^2 + 96035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13555520201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13555520203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43170290 + ... + 43170603.

It is an arithmetic number, because the mean of its divisors is an integer number (3410465313).

Almost surely, 2^13555520201 is an apocalyptic number.

It is an amenable number.

13555520201 is a deficient number, since it is larger than the sum of its proper divisors (86341051).

13555520201 is an equidigital number, since it uses as much as digits as its factorization.

13555520201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86341050.

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 13555520201 in words is "thirteen billion, five hundred fifty-five million, five hundred twenty thousand, two hundred one".