55603003 has 2 divisors, whose sum is σ = 55603004. Its totient is φ = 55603002.

The previous prime is 55603001. The next prime is 55603007. The reversal of 55603003 is 30030655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55603003 - 2¹ = 55603001 is a prime.

Together with 55603001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55603001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27801501 + 27801502.

It is an arithmetic number, because the mean of its divisors is an integer number (27801502).

Almost surely, 2^55603003 is an apocalyptic number.

55603003 is a deficient number, since it is larger than the sum of its proper divisors (1).

55603003 is an equidigital number, since it uses as much as digits as its factorization.

55603003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 55603003 is about 7456.7421170374. The cubic root of 55603003 is about 381.6800108054.

Adding to 55603003 its reverse (30030655), we get a palindrome (85633658).

The spelling of 55603003 in words is "fifty-five million, six hundred three thousand, three".