55427278 has 4 divisors (see below), whose sum is σ = 83140920. Its totient is φ = 27713638.

The previous prime is 55427257. The next prime is 55427303. The reversal of 55427278 is 87272455.

It is a happy number.

55427278 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 a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 55427278.

It is a congruent 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 as a sum of consecutive naturals, namely, 13856818 + ... + 13856821.

It is an arithmetic number, because the mean of its divisors is an integer number (20785230).

Almost surely, 2^55427278 is an apocalyptic number.

55427278 is a deficient number, since it is larger than the sum of its proper divisors (27713642).

55427278 is a wasteful number, since it uses less digits than its factorization.

55427278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27713641.

The product of its digits is 156800, while the sum is 40.

The square root of 55427278 is about 7444.9498319331. The cubic root of 55427278 is about 381.2775055673.

The spelling of 55427278 in words is "fifty-five million, four hundred twenty-seven thousand, two hundred seventy-eight".