2540401043 has 2 divisors, whose sum is σ = 2540401044. Its totient is φ = 2540401042.

The previous prime is 2540401021. The next prime is 2540401057. The reversal of 2540401043 is 3401040452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2540401043 - 2¹⁰ = 2540400019 is a prime.

It is not a weakly prime, because it can be changed into another prime (2540401063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270200521 + 1270200522.

It is an arithmetic number, because the mean of its divisors is an integer number (1270200522).

Almost surely, 2^2540401043 is an apocalyptic number.

2540401043 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540401043 is an equidigital number, since it uses as much as digits as its factorization.

2540401043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2540401043 is about 50402.3912428766. The cubic root of 2540401043 is about 1364.4807952584.

Adding to 2540401043 its reverse (3401040452), we get a palindrome (5941441495).

The spelling of 2540401043 in words is "two billion, five hundred forty million, four hundred one thousand, forty-three".