55603 has 2 divisors, whose sum is σ = 55604. Its totient is φ = 55602.

The previous prime is 55589. The next prime is 55609. The reversal of 55603 is 30655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55603 is a prime.

55603 is a lucky number.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (55609) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27801 + 27802.

It is an arithmetic number, because the mean of its divisors is an integer number (27802).

2⁵⁵⁶⁰³ is an apocalyptic number.

55603 is a deficient number, since it is larger than the sum of its proper divisors (1).

55603 is an equidigital number, since it uses as much as digits as its factorization.

55603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 55603 is about 235.8028837822. The cubic root of 55603 is about 38.1680003941.

The spelling of 55603 in words is "fifty-five thousand, six hundred three".