55427257 has 2 divisors, whose sum is σ = 55427258. Its totient is φ = 55427256.

The previous prime is 55427249. The next prime is 55427303. The reversal of 55427257 is 75272455.

55427257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53816896 + 1610361 = 7336^2 + 1269^2 .

It is a cyclic number.

It is not a de Polignac number, because 55427257 - 2³ = 55427249 is a prime.

It is not a weakly prime, because it can be changed into another prime (55427227) 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, 27713628 + 27713629.

It is an arithmetic number, because the mean of its divisors is an integer number (27713629).

Almost surely, 2^55427257 is an apocalyptic number.

It is an amenable number.

55427257 is a deficient number, since it is larger than the sum of its proper divisors (1).

55427257 is an equidigital number, since it uses as much as digits as its factorization.

55427257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98000, while the sum is 37.

The square root of 55427257 is about 7444.9484215809. The cubic root of 55427257 is about 381.2774574151.

The spelling of 55427257 in words is "fifty-five million, four hundred twenty-seven thousand, two hundred fifty-seven".