2042803561 has 4 divisors (see below), whose sum is σ = 2065756500. Its totient is φ = 2019850624.

The previous prime is 2042803523. The next prime is 2042803571. The reversal of 2042803561 is 1653082402.

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 970634025 + 1072169536 = 31155^2 + 32744^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042803561 - 2²³ = 2034414953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2042803571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11476336 + ... + 11476513.

It is an arithmetic number, because the mean of its divisors is an integer number (516439125).

Almost surely, 2^2042803561 is an apocalyptic number.

It is an amenable number.

2042803561 is a deficient number, since it is larger than the sum of its proper divisors (22952939).

2042803561 is an equidigital number, since it uses as much as digits as its factorization.

2042803561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22952938.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2042803561 is about 45197.3844486603. The cubic root of 2042803561 is about 1268.8458651111.

Adding to 2042803561 its reverse (1653082402), we get a palindrome (3695885963).

The spelling of 2042803561 in words is "two billion, forty-two million, eight hundred three thousand, five hundred sixty-one".