550056421 has 2 divisors, whose sum is σ = 550056422. Its totient is φ = 550056420.

The previous prime is 550056391. The next prime is 550056491. The reversal of 550056421 is 124650055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293608225 + 256448196 = 17135^2 + 16014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550056421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 550056421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550056491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275028210 + 275028211.

It is an arithmetic number, because the mean of its divisors is an integer number (275028211).

Almost surely, 2^550056421 is an apocalyptic number.

It is an amenable number.

550056421 is a deficient number, since it is larger than the sum of its proper divisors (1).

550056421 is an equidigital number, since it uses as much as digits as its factorization.

550056421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 550056421 is about 23453.2816680310. The cubic root of 550056421 is about 819.3492859611.

The spelling of 550056421 in words is "five hundred fifty million, fifty-six thousand, four hundred twenty-one".