55820227 has 2 divisors, whose sum is σ = 55820228. Its totient is φ = 55820226.

The previous prime is 55820207. The next prime is 55820267. The reversal of 55820227 is 72202855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55820227 - 2¹⁹ = 55295939 is a prime.

It is not a weakly prime, because it can be changed into another prime (55820207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27910113 + 27910114.

It is an arithmetic number, because the mean of its divisors is an integer number (27910114).

Almost surely, 2^55820227 is an apocalyptic number.

55820227 is a deficient number, since it is larger than the sum of its proper divisors (1).

55820227 is an equidigital number, since it uses as much as digits as its factorization.

55820227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 55820227 is about 7471.2935292358. The cubic root of 55820227 is about 382.1764008072.

The spelling of 55820227 in words is "fifty-five million, eight hundred twenty thousand, two hundred twenty-seven".