2540340427 has 2 divisors, whose sum is σ = 2540340428. Its totient is φ = 2540340426.

The previous prime is 2540340389. The next prime is 2540340461. The reversal of 2540340427 is 7240430452.

It is a happy number.

2540340427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2540340427 is a prime.

It is not a weakly prime, because it can be changed into another prime (2540344427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270170213 + 1270170214.

It is an arithmetic number, because the mean of its divisors is an integer number (1270170214).

Almost surely, 2^2540340427 is an apocalyptic number.

2540340427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540340427 is an equidigital number, since it uses as much as digits as its factorization.

2540340427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 31.

The square root of 2540340427 is about 50401.7899186130. The cubic root of 2540340427 is about 1364.4699426379.

Adding to 2540340427 its reverse (7240430452), we get a palindrome (9780770879).

The spelling of 2540340427 in words is "two billion, five hundred forty million, three hundred forty thousand, four hundred twenty-seven".