55806503 has 2 divisors, whose sum is σ = 55806504. Its totient is φ = 55806502.

The previous prime is 55806451. The next prime is 55806523. The reversal of 55806503 is 30560855.

55806503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55806503 - 2¹⁰ = 55805479 is a prime.

It is a super-2 number, since 2×55806503² = 6228731554178018, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55806503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55806523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27903251 + 27903252.

It is an arithmetic number, because the mean of its divisors is an integer number (27903252).

Almost surely, 2^55806503 is an apocalyptic number.

55806503 is a deficient number, since it is larger than the sum of its proper divisors (1).

55806503 is an equidigital number, since it uses as much as digits as its factorization.

55806503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 55806503 is about 7470.3750240533. The cubic root of 55806503 is about 382.1450775210.

The spelling of 55806503 in words is "fifty-five million, eight hundred six thousand, five hundred three".