55427805 has 48 divisors (see below), whose sum is σ = 99740160. Its totient is φ = 28456704.

The previous prime is 55427797. The next prime is 55427809. The reversal of 55427805 is 50872455.

It is a happy number.

55427805 is a `hidden beast` number, since 554 + 27 + 80 + 5 = 666.

It is not a de Polignac number, because 55427805 - 2³ = 55427797 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55427805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55427809) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154216 + ... + 154574.

It is an arithmetic number, because the mean of its divisors is an integer number (2077920).

Almost surely, 2^55427805 is an apocalyptic number.

It is an amenable number.

55427805 is a deficient number, since it is larger than the sum of its proper divisors (44312355).

55427805 is a wasteful number, since it uses less digits than its factorization.

55427805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 55427805 is about 7444.9852249685. The cubic root of 55427805 is about 381.2787139531.

It can be divided in two parts, 5542780 and 5, that added together give a triangular number (5542785 = T₃₃₂₉).

The spelling of 55427805 in words is "fifty-five million, four hundred twenty-seven thousand, eight hundred five".