1311023255 has 16 divisors (see below), whose sum is σ = 1670608800. Its totient is φ = 984256512.

The previous prime is 1311023251. The next prime is 1311023261. The reversal of 1311023255 is 5523201131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1311023255 - 2² = 1311023251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311023255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311023251) 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 in 15 ways as a sum of consecutive naturals, for example, 7271 + ... + 51719.

It is an arithmetic number, because the mean of its divisors is an integer number (104413050).

Almost surely, 2^1311023255 is an apocalyptic number.

1311023255 is a deficient number, since it is larger than the sum of its proper divisors (359585545).

1311023255 is a wasteful number, since it uses less digits than its factorization.

1311023255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44818.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1311023255 is about 36208.0551120880. The cubic root of 1311023255 is about 1094.4690002039.

Adding to 1311023255 its reverse (5523201131), we get a palindrome (6834224386).

The spelling of 1311023255 in words is "one billion, three hundred eleven million, twenty-three thousand, two hundred fifty-five".