43021226406555 has 12 divisors (see below), whose sum is σ = 74570125771440. Its totient is φ = 22944654083472.

The previous prime is 43021226406511. The next prime is 43021226406563. The reversal of 43021226406555 is 55560462212034.

43021226406555 is a `hidden beast` number, since 4 + 3 + 0 + 212 + 26 + 406 + 5 + 5 + 5 = 666.

43021226406555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43021226406555 - 2⁹ = 43021226406043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 956027253479 = 43021226406555 / (4 + 3 + 0 + 2 + 1 + 2 + 2 + 6 + 4 + 0 + 6 + 5 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 43021226406555.

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 11 ways as a sum of consecutive naturals, for example, 478013626695 + ... + 478013626784.

It is an arithmetic number, because the mean of its divisors is an integer number (6214177147620).

Almost surely, 2^{43021226406555} is an apocalyptic number.

43021226406555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

43021226406555 is a deficient number, since it is larger than the sum of its proper divisors (31548899364885).

43021226406555 is a wasteful number, since it uses less digits than its factorization.

43021226406555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956027253490 (or 956027253487 counting only the distinct ones).

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

Adding to 43021226406555 its reverse (55560462212034), we get a palindrome (98581688618589).

The spelling of 43021226406555 in words is "forty-three trillion, twenty-one billion, two hundred twenty-six million, four hundred six thousand, five hundred fifty-five".