55000555 has 4 divisors (see below), whose sum is σ = 66000672. Its totient is φ = 44000440.

The previous prime is 55000553. The next prime is 55000571. The reversal of 55000555 is 55500055.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55000555 - 2¹ = 55000553 is a prime.

It is a super-2 number, since 2×55000555² = 6050122100616050, which contains 22 as substring.

It is a Duffinian number.

55000555 is a modest number, since divided by 555 gives 55 as remainder.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55000553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5500051 + ... + 5500060.

It is an arithmetic number, because the mean of its divisors is an integer number (16500168).

Almost surely, 2^55000555 is an apocalyptic number.

55000555 is a deficient number, since it is larger than the sum of its proper divisors (11000117).

55000555 is a wasteful number, since it uses less digits than its factorization.

55000555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11000116.

The product of its (nonzero) digits is 3125, while the sum is 25.

The square root of 55000555 is about 7416.2359050936. The cubic root of 55000555 is about 380.2965252468.

Subtracting 55000555 from its reverse (55500055), we obtain a triangular number (499500 = T₉₉₉).

It can be divided in two parts, 55000 and 555, that added together give a palindrome (55555).

The spelling of 55000555 in words is "fifty-five million, five hundred fifty-five", and thus it is an aban number.