2040443261 has 2 divisors, whose sum is σ = 2040443262. Its totient is φ = 2040443260.

The previous prime is 2040443239. The next prime is 2040443311. The reversal of 2040443261 is 1623440402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2028151225 + 12292036 = 45035^2 + 3506^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040443261 - 2¹⁰ = 2040442237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2040443261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040443861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020221630 + 1020221631.

It is an arithmetic number, because the mean of its divisors is an integer number (1020221631).

Almost surely, 2^2040443261 is an apocalyptic number.

It is an amenable number.

2040443261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040443261 is an equidigital number, since it uses as much as digits as its factorization.

2040443261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 2040443261 is about 45171.2658777679. The cubic root of 2040443261 is about 1268.3569926722.

Adding to 2040443261 its reverse (1623440402), we get a palindrome (3663883663).

The spelling of 2040443261 in words is "two billion, forty million, four hundred forty-three thousand, two hundred sixty-one".