55055555 has 8 divisors (see below), whose sum is σ = 67186800. Its totient is φ = 43297696.

The previous prime is 55055479. The next prime is 55055569. The reversal of 55055555 is 55555055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55055555 is a prime.

It is a super-2 number, since 2×55055555² = 6062228272716050, which contains 22 as substring.

55055555 is a modest number, since divided by 5555 gives 5505 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93020 + ... + 93609.

It is an arithmetic number, because the mean of its divisors is an integer number (8398350).

Almost surely, 2^55055555 is an apocalyptic number.

55055555 is a deficient number, since it is larger than the sum of its proper divisors (12131245).

55055555 is a wasteful number, since it uses less digits than its factorization.

55055555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186693.

The product of its (nonzero) digits is 78125, while the sum is 35.

The square root of 55055555 is about 7419.9430590807. The cubic root of 55055555 is about 380.4232472451.

Subtracting 55055555 from its reverse (55555055), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 55055555 in words is "fifty-five million, fifty-five thousand, five hundred fifty-five".