55420213529 has 2 divisors, whose sum is σ = 55420213530. Its totient is φ = 55420213528.

The previous prime is 55420213501. The next prime is 55420213561. The reversal of 55420213529 is 92531202455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41159077129 + 14261136400 = 202877^2 + 119420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55420213529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55420213492 and 55420213501.

It is not a weakly prime, because it can be changed into another prime (55420213729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27710106764 + 27710106765.

It is an arithmetic number, because the mean of its divisors is an integer number (27710106765).

Almost surely, 2^55420213529 is an apocalyptic number.

It is an amenable number.

55420213529 is a deficient number, since it is larger than the sum of its proper divisors (1).

55420213529 is an equidigital number, since it uses as much as digits as its factorization.

55420213529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 55420213529 in words is "fifty-five billion, four hundred twenty million, two hundred thirteen thousand, five hundred twenty-nine".