55505505 has 16 divisors (see below), whose sum is σ = 96882624. Its totient is φ = 26911680.

The previous prime is 55505497. The next prime is 55505519. The reversal of 55505505 is 50550555.

It is not a de Polignac number, because 55505505 - 2³ = 55505497 is a prime.

It is a super-2 number, since 2×55505505² = 6161722170610050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168034 + ... + 168363.

It is an arithmetic number, because the mean of its divisors is an integer number (6055164).

Almost surely, 2^55505505 is an apocalyptic number.

55505505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55505505 is a deficient number, since it is larger than the sum of its proper divisors (41377119).

55505505 is a wasteful number, since it uses less digits than its factorization.

55505505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336416.

The product of its (nonzero) digits is 15625, while the sum is 30.

The square root of 55505505 is about 7450.2016751226. The cubic root of 55505505 is about 381.4567925887.

It can be divided in two parts, 5550550 and 5, that added together give a palindrome (5550555).

The spelling of 55505505 in words is "fifty-five million, five hundred five thousand, five hundred five".