2103550561 has 16 divisors (see below), whose sum is σ = 2442528000. Its totient is φ = 1774415808.

The previous prime is 2103550531. The next prime is 2103550577. The reversal of 2103550561 is 1650553012.

It is a cyclic number.

It is not a de Polignac number, because 2103550561 - 2¹³ = 2103542369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2103550531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104436 + ... + 122938.

It is an arithmetic number, because the mean of its divisors is an integer number (152658000).

Almost surely, 2^2103550561 is an apocalyptic number.

It is an amenable number.

2103550561 is a deficient number, since it is larger than the sum of its proper divisors (338977439).

2103550561 is a wasteful number, since it uses less digits than its factorization.

2103550561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18768.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 2103550561 is about 45864.4803851521. The cubic root of 2103550561 is about 1281.3004688555.

The spelling of 2103550561 in words is "two billion, one hundred three million, five hundred fifty thousand, five hundred sixty-one".