2101354555 has 4 divisors (see below), whose sum is σ = 2521625472. Its totient is φ = 1681083640.

The previous prime is 2101354531. The next prime is 2101354559. The reversal of 2101354555 is 5554531012.

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

It is not a de Polignac number, because 2101354555 - 2⁹ = 2101354043 is a prime.

It is a Smith number, since the sum of its digits (31) 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 not an unprimeable number, because it can be changed into a prime (2101354559) 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 3 ways as a sum of consecutive naturals, for example, 210135451 + ... + 210135460.

It is an arithmetic number, because the mean of its divisors is an integer number (630406368).

Almost surely, 2^2101354555 is an apocalyptic number.

2101354555 is a deficient number, since it is larger than the sum of its proper divisors (420270917).

2101354555 is an equidigital number, since it uses as much as digits as its factorization.

2101354555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420270916.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 2101354555 is about 45840.5339737661. The cubic root of 2101354555 is about 1280.8544415093.

Adding to 2101354555 its reverse (5554531012), we get a palindrome (7655885567).

The spelling of 2101354555 in words is "two billion, one hundred one million, three hundred fifty-four thousand, five hundred fifty-five".