10515563257 has 2 divisors, whose sum is σ = 10515563258. Its totient is φ = 10515563256.

The previous prime is 10515563249. The next prime is 10515563291. The reversal of 10515563257 is 75236551501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7323765241 + 3191798016 = 85579^2 + 56496^2 .

It is a cyclic number.

It is not a de Polignac number, because 10515563257 - 2³ = 10515563249 is a prime.

It is a super-2 number, since 2×10515563257² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10515563237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5257781628 + 5257781629.

It is an arithmetic number, because the mean of its divisors is an integer number (5257781629).

Almost surely, 2^10515563257 is an apocalyptic number.

It is an amenable number.

10515563257 is a deficient number, since it is larger than the sum of its proper divisors (1).

10515563257 is an equidigital number, since it uses as much as digits as its factorization.

10515563257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157500, while the sum is 40.

The spelling of 10515563257 in words is "ten billion, five hundred fifteen million, five hundred sixty-three thousand, two hundred fifty-seven".