55506221221573 has 2 divisors, whose sum is σ = 55506221221574. Its totient is φ = 55506221221572.

The previous prime is 55506221221501. The next prime is 55506221221579. The reversal of 55506221221573 is 37512212260555.

55506221221573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49414812207489 + 6091409014084 = 7029567^2 + 2468078^2 .

It is a cyclic number.

It is not a de Polignac number, because 55506221221573 - 2¹³ = 55506221213381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55506221221579) 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 as a sum of consecutive naturals, namely, 27753110610786 + 27753110610787.

It is an arithmetic number, because the mean of its divisors is an integer number (27753110610787).

Almost surely, 2^{55506221221573} is an apocalyptic number.

It is an amenable number.

55506221221573 is a deficient number, since it is larger than the sum of its proper divisors (1).

55506221221573 is an equidigital number, since it uses as much as digits as its factorization.

55506221221573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260000, while the sum is 46.

The spelling of 55506221221573 in words is "fifty-five trillion, five hundred six billion, two hundred twenty-one million, two hundred twenty-one thousand, five hundred seventy-three".