311123305256 has 8 divisors (see below), whose sum is σ = 583356197370. Its totient is φ = 155561652624.

The previous prime is 311123305189. The next prime is 311123305307. The reversal of 311123305256 is 652503321113.

It can be written as a sum of positive squares in only one way, i.e., 302572604356 + 8550700900 = 550066^2 + 92470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×311123305256² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19445206571 + ... + 19445206586.

Almost surely, 2^311123305256 is an apocalyptic number.

It is an amenable number.

311123305256 is a deficient number, since it is larger than the sum of its proper divisors (272232892114).

311123305256 is a wasteful number, since it uses less digits than its factorization.

311123305256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38890413163 (or 38890413159 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 311123305256 its reverse (652503321113), we get a palindrome (963626626369).

The spelling of 311123305256 in words is "three hundred eleven billion, one hundred twenty-three million, three hundred five thousand, two hundred fifty-six".