2439515257 has 2 divisors, whose sum is σ = 2439515258. Its totient is φ = 2439515256.

The previous prime is 2439515231. The next prime is 2439515311. The reversal of 2439515257 is 7525159342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2292111376 + 147403881 = 47876^2 + 12141^2 .

It is a cyclic number.

It is not a de Polignac number, because 2439515257 - 2¹⁵ = 2439482489 is a prime.

It is not a weakly prime, because it can be changed into another prime (2439515207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1219757628 + 1219757629.

It is an arithmetic number, because the mean of its divisors is an integer number (1219757629).

Almost surely, 2^2439515257 is an apocalyptic number.

It is an amenable number.

2439515257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2439515257 is an equidigital number, since it uses as much as digits as its factorization.

2439515257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 43.

The square root of 2439515257 is about 49391.4492295984. The cubic root of 2439515257 is about 1346.1739416888.

The spelling of 2439515257 in words is "two billion, four hundred thirty-nine million, five hundred fifteen thousand, two hundred fifty-seven".