5557 has 2 divisors, whose sum is σ = 5558.
Its totient is φ = 5556.
The previous prime is 5531. The next prime is 5563. The reversal of 5557 is 7555.
5557 is nontrivially palindromic in base 2.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 5476 + 81 = 74^2 + 9^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-5557 is a prime.
It is a plaindrome in base 10.
It is a nialpdrome in base 9.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (5507) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2778 + 2779.
It is an arithmetic number, because the mean of its divisors is an integer number (2779).
25557 is an apocalyptic number.
It is an amenable number.
5557 is a deficient number, since it is larger than the sum of its proper divisors (1).
5557 is an equidigital number, since it uses as much as digits as its factorization.
5557 is an evil number, because the sum of its binary digits is even.
The product of its digits is 875, while the sum is 22.
The square root of 5557 is about 74.5452882482.
The cubic root of 5557 is about 17.7125109713.
The spelling of 5557 in words is "five thousand, five hundred fifty-seven".