55550503 has 2 divisors, whose sum is σ = 55550504. Its totient is φ = 55550502.

The previous prime is 55550501. The next prime is 55550527. The reversal of 55550503 is 30505555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55550503 - 2¹ = 55550501 is a prime.

Together with 55550501, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55550501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775251 + 27775252.

It is an arithmetic number, because the mean of its divisors is an integer number (27775252).

Almost surely, 2^55550503 is an apocalyptic number.

55550503 is a deficient number, since it is larger than the sum of its proper divisors (1).

55550503 is an equidigital number, since it uses as much as digits as its factorization.

55550503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9375, while the sum is 28.

The square root of 55550503 is about 7453.2209815623. The cubic root of 55550503 is about 381.5598463691.

The spelling of 55550503 in words is "fifty-five million, five hundred fifty thousand, five hundred three".