2440440251 has 2 divisors, whose sum is σ = 2440440252. Its totient is φ = 2440440250.

The previous prime is 2440440239. The next prime is 2440440259. The reversal of 2440440251 is 1520440442.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2440440251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2440440251.

It is not a weakly prime, because it can be changed into another prime (2440440259) 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 as a sum of consecutive naturals, namely, 1220220125 + 1220220126.

It is an arithmetic number, because the mean of its divisors is an integer number (1220220126).

Almost surely, 2^2440440251 is an apocalyptic number.

2440440251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440440251 is an equidigital number, since it uses as much as digits as its factorization.

2440440251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 2440440251 is about 49400.8122504074. The cubic root of 2440440251 is about 1346.3440636652.

Adding to 2440440251 its reverse (1520440442), we get a palindrome (3960880693).

The spelling of 2440440251 in words is "two billion, four hundred forty million, four hundred forty thousand, two hundred fifty-one".