1311050256 has 40 divisors (see below), whose sum is σ = 3417965760. Its totient is φ = 433005696.

The previous prime is 1311050249. The next prime is 1311050261. The reversal of 1311050256 is 6520501131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120060 + ... + 130523.

It is an arithmetic number, because the mean of its divisors is an integer number (85449144).

Almost surely, 2^1311050256 is an apocalyptic number.

1311050256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1311050256 is an abundant number, since it is smaller than the sum of its proper divisors (2106915504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311050256 is a wasteful number, since it uses less digits than its factorization.

1311050256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250703 (or 250697 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1311050256 is about 36208.4279691897. The cubic root of 1311050256 is about 1094.4765138145.

Adding to 1311050256 its reverse (6520501131), we get a palindrome (7831551387).

The spelling of 1311050256 in words is "one billion, three hundred eleven million, fifty thousand, two hundred fifty-six".