55557 has 6 divisors (see below), whose sum is σ = 80262. Its totient is φ = 37032.

The previous prime is 55547. The next prime is 55579. The reversal of 55557 is 75555.

It can be written as a sum of positive squares in only one way, i.e., 30276 + 25281 = 174^2 + 159^2 .

It is not a de Polignac number, because 55557 - 2⁴ = 55541 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 55557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3078 + ... + 3095.

It is an arithmetic number, because the mean of its divisors is an integer number (13377).

2⁵⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

55557 is a deficient number, since it is larger than the sum of its proper divisors (24705).

55557 is a wasteful number, since it uses less digits than its factorization.

55557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6179 (or 6176 counting only the distinct ones).

The product of its digits is 4375, while the sum is 27.

The square root of 55557 is about 235.7053245050. The cubic root of 55557 is about 38.1574721108.

The spelling of 55557 in words is "fifty-five thousand, five hundred fifty-seven".