55742278 has 8 divisors (see below), whose sum is σ = 86310720. Its totient is φ = 26972040.

The previous prime is 55742249. The next prime is 55742287. The reversal of 55742278 is 87224755.

It is a happy number.

55742278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55742278.

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 in 3 ways as a sum of consecutive naturals, for example, 449473 + ... + 449596.

It is an arithmetic number, because the mean of its divisors is an integer number (10788840).

Almost surely, 2^55742278 is an apocalyptic number.

55742278 is a deficient number, since it is larger than the sum of its proper divisors (30568442).

55742278 is a wasteful number, since it uses less digits than its factorization.

55742278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899102.

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

The square root of 55742278 is about 7466.0751402594. The cubic root of 55742278 is about 381.9984238306.

The spelling of 55742278 in words is "fifty-five million, seven hundred forty-two thousand, two hundred seventy-eight".