2020201555 has 4 divisors (see below), whose sum is σ = 2424241872. Its totient is φ = 1616161240.

The previous prime is 2020201549. The next prime is 2020201597. The reversal of 2020201555 is 5551020202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2020201555 - 2⁵ = 2020201523 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202020151 + ... + 202020160.

It is an arithmetic number, because the mean of its divisors is an integer number (606060468).

Almost surely, 2^2020201555 is an apocalyptic number.

2020201555 is a deficient number, since it is larger than the sum of its proper divisors (404040317).

2020201555 is an equidigital number, since it uses as much as digits as its factorization.

2020201555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404040316.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 2020201555 is about 44946.6523225034. The cubic root of 2020201555 is about 1264.1489075341.

Adding to 2020201555 its reverse (5551020202), we get a palindrome (7571221757).

The spelling of 2020201555 in words is "two billion, twenty million, two hundred one thousand, five hundred fifty-five".