55421445520223 has 2 divisors, whose sum is σ = 55421445520224. Its totient is φ = 55421445520222.

The previous prime is 55421445520213. The next prime is 55421445520267. The reversal of 55421445520223 is 32202554412455.

It is an a-pointer prime, because the next prime (55421445520267) can be obtained adding 55421445520223 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55421445520223 - 2⁶ = 55421445520159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55421445520213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27710722760111 + 27710722760112.

It is an arithmetic number, because the mean of its divisors is an integer number (27710722760112).

Almost surely, 2^{55421445520223} is an apocalyptic number.

55421445520223 is a deficient number, since it is larger than the sum of its proper divisors (1).

55421445520223 is an equidigital number, since it uses as much as digits as its factorization.

55421445520223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920000, while the sum is 44.

Adding to 55421445520223 its reverse (32202554412455), we get a palindrome (87623999932678).

The spelling of 55421445520223 in words is "fifty-five trillion, four hundred twenty-one billion, four hundred forty-five million, five hundred twenty thousand, two hundred twenty-three".