55000403 has 2 divisors, whose sum is σ = 55000404. Its totient is φ = 55000402.

The previous prime is 55000369. The next prime is 55000469. The reversal of 55000403 is 30400055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55000403 - 2¹⁰ = 54999379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55002403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27500201 + 27500202.

It is an arithmetic number, because the mean of its divisors is an integer number (27500202).

Almost surely, 2^55000403 is an apocalyptic number.

55000403 is a deficient number, since it is larger than the sum of its proper divisors (1).

55000403 is an equidigital number, since it uses as much as digits as its factorization.

55000403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 55000403 is about 7416.2256573003. The cubic root of 55000403 is about 380.2961749162.

Adding to 55000403 its reverse (30400055), we get a palindrome (85400458).

The spelling of 55000403 in words is "fifty-five million, four hundred three", and thus it is an aban number.