311123412 has 36 divisors (see below), whose sum is σ = 787002580. Its totient is φ = 103635072.

The previous prime is 311123399. The next prime is 311123419. The reversal of 311123412 is 214321113.

311123412 is a `hidden beast` number, since 311 + 12 + 341 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 177582276 + 133541136 = 13326^2 + 11556^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311123419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80664 + ... + 84432.

Almost surely, 2^311123412 is an apocalyptic number.

It is an amenable number.

311123412 is an abundant number, since it is smaller than the sum of its proper divisors (475879168).

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

311123412 is a wasteful number, since it uses less digits than its factorization.

311123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072 (or 6067 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 311123412 is about 17638.6907677412. The cubic root of 311123412 is about 677.6065015055.

Adding to 311123412 its reverse (214321113), we get a palindrome (525444525).

The spelling of 311123412 in words is "three hundred eleven million, one hundred twenty-three thousand, four hundred twelve".