405231222055 has 32 divisors (see below), whose sum is σ = 571405529088. Its totient is φ = 272806406400.

The previous prime is 405231222047. The next prime is 405231222079. The reversal of 405231222055 is 550222132504.

It is not a de Polignac number, because 405231222055 - 2³ = 405231222047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5127574 + ... + 5206003.

It is an arithmetic number, because the mean of its divisors is an integer number (17856422784).

Almost surely, 2^405231222055 is an apocalyptic number.

405231222055 is a deficient number, since it is larger than the sum of its proper divisors (166174307033).

405231222055 is a wasteful number, since it uses less digits than its factorization.

405231222055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10333647.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 405231222055 its reverse (550222132504), we get a palindrome (955453354559).

The spelling of 405231222055 in words is "four hundred five billion, two hundred thirty-one million, two hundred twenty-two thousand, fifty-five".