1255116263 has 4 divisors (see below), whose sum is σ = 1276389480. Its totient is φ = 1233843048.

The previous prime is 1255116227. The next prime is 1255116277. The reversal of 1255116263 is 3626115521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1255116263 - 2²⁰ = 1254067687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255116223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10636520 + ... + 10636637.

It is an arithmetic number, because the mean of its divisors is an integer number (319097370).

Almost surely, 2^1255116263 is an apocalyptic number.

1255116263 is a deficient number, since it is larger than the sum of its proper divisors (21273217).

1255116263 is an equidigital number, since it uses as much as digits as its factorization.

1255116263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21273216.

The product of its digits is 10800, while the sum is 32.

The square root of 1255116263 is about 35427.6200583669. The cubic root of 1255116263 is about 1078.6850316800.

The spelling of 1255116263 in words is "one billion, two hundred fifty-five million, one hundred sixteen thousand, two hundred sixty-three".