2043040561 has 4 divisors (see below), whose sum is σ = 2071027492. Its totient is φ = 2015053632.

The previous prime is 2043040541. The next prime is 2043040579. The reversal of 2043040561 is 1650403402.

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 1394574336 + 648466225 = 37344^2 + 25465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043040561 - 2⁹ = 2043040049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2043040511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13993356 + ... + 13993501.

It is an arithmetic number, because the mean of its divisors is an integer number (517756873).

Almost surely, 2^2043040561 is an apocalyptic number.

It is an amenable number.

2043040561 is a deficient number, since it is larger than the sum of its proper divisors (27986931).

2043040561 is an equidigital number, since it uses as much as digits as its factorization.

2043040561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27986930.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2043040561 is about 45200.0062057518. The cubic root of 2043040561 is about 1268.8949324561.

Adding to 2043040561 its reverse (1650403402), we get a palindrome (3693443963).

The spelling of 2043040561 in words is "two billion, forty-three million, forty thousand, five hundred sixty-one".