311543221032612 has 18 divisors (see below), whose sum is σ = 787512030943638. Its totient is φ = 103847740344192.

The previous prime is 311543221032601. The next prime is 311543221032619. The reversal of 311543221032612 is 216230122345113.

311543221032612 is a `hidden beast` number, since 3 + 1 + 1 + 5 + 4 + 3 + 2 + 2 + 1 + 0 + 32 + 612 = 666.

It can be written as a sum of positive squares in only one way, i.e., 275366677118976 + 36176543913636 = 16594176^2 + 6014694^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 8653978362017 = 311543221032612 / (3 + 1 + 1 + 5 + 4 + 3 + 2 + 2 + 1 + 0 + 3 + 2 + 6 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (311543221032619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4326989180973 + ... + 4326989181044.

Almost surely, 2^{311543221032612} is an apocalyptic number.

It is an amenable number.

311543221032612 is an abundant number, since it is smaller than the sum of its proper divisors (475968809911026).

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

311543221032612 is a wasteful number, since it uses less digits than its factorization.

311543221032612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8653978362027 (or 8653978362022 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 311543221032612 its reverse (216230122345113), we get a palindrome (527773343377725).

The spelling of 311543221032612 in words is "three hundred eleven trillion, five hundred forty-three billion, two hundred twenty-one million, thirty-two thousand, six hundred twelve".