312211243345455 has 256 divisors, whose sum is σ = 620891976499200. Its totient is φ = 148045681428480.

The previous prime is 312211243345451. The next prime is 312211243345483. The reversal of 312211243345455 is 554543342112213.

312211243345455 is a `hidden beast` number, since 3 + 1 + 2 + 2 + 1 + 124 + 33 + 45 + 455 = 666.

It is not a de Polignac number, because 312211243345455 - 2² = 312211243345451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 312211243345455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312211243345451) 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 255 ways as a sum of consecutive naturals, for example, 1401277572 + ... + 1401500358.

It is an arithmetic number, because the mean of its divisors is an integer number (2425359283200).

Almost surely, 2^{312211243345455} is an apocalyptic number.

312211243345455 is a deficient number, since it is larger than the sum of its proper divisors (308680733153745).

312211243345455 is a wasteful number, since it uses less digits than its factorization.

312211243345455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223171 (or 223165 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

Adding to 312211243345455 its reverse (554543342112213), we get a palindrome (866754585457668).

The spelling of 312211243345455 in words is "three hundred twelve trillion, two hundred eleven billion, two hundred forty-three million, three hundred forty-five thousand, four hundred fifty-five".