1255515011 has 2 divisors, whose sum is σ = 1255515012. Its totient is φ = 1255515010.

The previous prime is 1255514999. The next prime is 1255515013. The reversal of 1255515011 is 1105155521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1255515011 - 2⁶ = 1255514947 is a prime.

Together with 1255515013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1255515013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627757505 + 627757506.

It is an arithmetic number, because the mean of its divisors is an integer number (627757506).

Almost surely, 2^1255515011 is an apocalyptic number.

1255515011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255515011 is an equidigital number, since it uses as much as digits as its factorization.

1255515011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1250, while the sum is 26.

The square root of 1255515011 is about 35433.2472545207. The cubic root of 1255515011 is about 1078.7992516318.

The spelling of 1255515011 in words is "one billion, two hundred fifty-five million, five hundred fifteen thousand, eleven".