55805503 has 16 divisors (see below), whose sum is σ = 61641216. Its totient is φ = 50208480.

The previous prime is 55805501. The next prime is 55805513. The reversal of 55805503 is 30550855.

It is a cyclic number.

It is not a de Polignac number, because 55805503 - 2¹ = 55805501 is a prime.

It is a super-2 number, since 2×55805503² = 6228508330166018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55805501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94776 + ... + 95362.

It is an arithmetic number, because the mean of its divisors is an integer number (3852576).

Almost surely, 2^55805503 is an apocalyptic number.

55805503 is a deficient number, since it is larger than the sum of its proper divisors (5835713).

55805503 is a wasteful number, since it uses less digits than its factorization.

55805503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 55805503 is about 7470.3080927094. The cubic root of 55805503 is about 382.1427949474.

The spelling of 55805503 in words is "fifty-five million, eight hundred five thousand, five hundred three".