1255515013 has 2 divisors, whose sum is σ = 1255515014. Its totient is φ = 1255515012.

The previous prime is 1255515011. The next prime is 1255515017. The reversal of 1255515013 is 3105155521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113023044 + 142491969 = 33362^2 + 11937^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255515013 - 2¹ = 1255515011 is a prime.

Together with 1255515011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255515011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627757506 + 627757507.

It is an arithmetic number, because the mean of its divisors is an integer number (627757507).

Almost surely, 2^1255515013 is an apocalyptic number.

It is an amenable number.

1255515013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255515013 is an equidigital number, since it uses as much as digits as its factorization.

1255515013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 1255515013 is about 35433.2472827428. The cubic root of 1255515013 is about 1078.7992522047.

The spelling of 1255515013 in words is "one billion, two hundred fifty-five million, five hundred fifteen thousand, thirteen".