Search a number
55487 is a prime number
BaseRepresentation
bin1101100010111111
32211010002
431202333
53233422
61104515
7320525
oct154277
984102
1055487
1138763
122813b
131c343
1416315
1511692
hexd8bf

55487 has 2 divisors, whose sum is σ = 55488. Its totient is φ = 55486.

The previous prime is 55469. The next prime is 55501. The reversal of 55487 is 78455.

It can be divided in two parts, 5548 and 7, that added together give a palindrome (5555).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55487 - 214 = 39103 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27743 + 27744.

It is an arithmetic number, because the mean of its divisors is an integer number (27744).

255487 is an apocalyptic number.

55487 is a deficient number, since it is larger than the sum of its proper divisors (1).

55487 is an equidigital number, since it uses as much as digits as its factorization.

55487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5600, while the sum is 29.

The square root of 55487 is about 235.5567872085. The cubic root of 55487 is about 38.1414396538.

The spelling of 55487 in words is "fifty-five thousand, four hundred eighty-seven".