2440251509 has 2 divisors, whose sum is σ = 2440251510. Its totient is φ = 2440251508.

The previous prime is 2440251481. The next prime is 2440251547. The reversal of 2440251509 is 9051520442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2360988100 + 79263409 = 48590^2 + 8903^2 .

It is a cyclic number.

It is not a de Polignac number, because 2440251509 - 2²⁰ = 2439202933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2440251559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220125754 + 1220125755.

It is an arithmetic number, because the mean of its divisors is an integer number (1220125755).

Almost surely, 2^2440251509 is an apocalyptic number.

It is an amenable number.

2440251509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440251509 is an equidigital number, since it uses as much as digits as its factorization.

2440251509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2440251509 is about 49398.9019007508. The cubic root of 2440251509 is about 1346.3093543236.

The spelling of 2440251509 in words is "two billion, four hundred forty million, two hundred fifty-one thousand, five hundred nine".