55807555 has 4 divisors (see below), whose sum is σ = 66969072. Its totient is φ = 44646040.

The previous prime is 55807489. The next prime is 55807567. The reversal of 55807555 is 55570855.

55807555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55807555 - 2⁹ = 55807043 is a prime.

It is a super-2 number, since 2×55807555² = 6228966390156050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5580751 + ... + 5580760.

It is an arithmetic number, because the mean of its divisors is an integer number (16742268).

Almost surely, 2^55807555 is an apocalyptic number.

55807555 is a deficient number, since it is larger than the sum of its proper divisors (11161517).

55807555 is a wasteful number, since it uses less digits than its factorization.

55807555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11161516.

The product of its (nonzero) digits is 175000, while the sum is 40.

The square root of 55807555 is about 7470.4454351799. The cubic root of 55807555 is about 382.1474787591.

The spelling of 55807555 in words is "fifty-five million, eight hundred seven thousand, five hundred fifty-five".