55305278 has 16 divisors (see below), whose sum is σ = 94906464. Its totient is φ = 23677920.

The previous prime is 55305259. The next prime is 55305281. The reversal of 55305278 is 87250355.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

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, 21476 + ... + 23912.

It is an arithmetic number, because the mean of its divisors is an integer number (5931654).

Almost surely, 2^55305278 is an apocalyptic number.

55305278 is a deficient number, since it is larger than the sum of its proper divisors (39601186).

55305278 is a wasteful number, since it uses less digits than its factorization.

55305278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 55305278 is about 7436.7518447236. The cubic root of 55305278 is about 380.9975590165.

The spelling of 55305278 in words is "fifty-five million, three hundred five thousand, two hundred seventy-eight".