55716278 has 4 divisors (see below), whose sum is σ = 83574420. Its totient is φ = 27858138.

The previous prime is 55716263. The next prime is 55716289. The reversal of 55716278 is 87261755.

55716278 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 Curzon number.

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, 13929068 + ... + 13929071.

It is an arithmetic number, because the mean of its divisors is an integer number (20893605).

Almost surely, 2^55716278 is an apocalyptic number.

55716278 is a deficient number, since it is larger than the sum of its proper divisors (27858142).

55716278 is a wasteful number, since it uses less digits than its factorization.

55716278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27858141.

The product of its digits is 117600, while the sum is 41.

The square root of 55716278 is about 7464.3337278018. Note that the first 3 decimals coincide. The cubic root of 55716278 is about 381.9390224571.

The spelling of 55716278 in words is "fifty-five million, seven hundred sixteen thousand, two hundred seventy-eight".