55255555 has 4 divisors (see below), whose sum is σ = 66306672. Its totient is φ = 44204440.

The previous prime is 55255517. The next prime is 55255573. The reversal of 55255555 is 55555255.

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

It is not a de Polignac number, because 55255555 - 2¹⁷ = 55124483 is a prime.

It is a Duffinian number.

55255555 is a modest number, since divided by 5555 gives 5525 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5525551 + ... + 5525560.

It is an arithmetic number, because the mean of its divisors is an integer number (16576668).

Almost surely, 2^55255555 is an apocalyptic number.

55255555 is a deficient number, since it is larger than the sum of its proper divisors (11051117).

55255555 is a wasteful number, since it uses less digits than its factorization.

55255555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11051116.

The product of its digits is 156250, while the sum is 37.

The square root of 55255555 is about 7433.4080340043. The cubic root of 55255555 is about 380.8833443487.

The spelling of 55255555 in words is "fifty-five million, two hundred fifty-five thousand, five hundred fifty-five".