55530227 has 2 divisors, whose sum is σ = 55530228. Its totient is φ = 55530226.

The previous prime is 55530197. The next prime is 55530253. The reversal of 55530227 is 72203555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55530227 - 2¹⁰ = 55529203 is a prime.

It is a super-2 number, since 2×55530227² = 6167212221343058, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55530227.

It is not a weakly prime, because it can be changed into another prime (55533227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765113 + 27765114.

It is an arithmetic number, because the mean of its divisors is an integer number (27765114).

Almost surely, 2^55530227 is an apocalyptic number.

55530227 is a deficient number, since it is larger than the sum of its proper divisors (1).

55530227 is an equidigital number, since it uses as much as digits as its factorization.

55530227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 55530227 is about 7451.8606401355. The cubic root of 55530227 is about 381.5134174531.

The spelling of 55530227 in words is "fifty-five million, five hundred thirty thousand, two hundred twenty-seven".