55393918 has 8 divisors (see below), whose sum is σ = 84858912. Its totient is φ = 27107616.

The previous prime is 55393903. The next prime is 55393937. The reversal of 55393918 is 81939355.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294555 + ... + 294742.

It is an arithmetic number, because the mean of its divisors is an integer number (10607364).

Almost surely, 2^55393918 is an apocalyptic number.

55393918 is a deficient number, since it is larger than the sum of its proper divisors (29464994).

55393918 is a wasteful number, since it uses less digits than its factorization.

55393918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589346.

The product of its digits is 145800, while the sum is 43.

The square root of 55393918 is about 7442.7090498017. The cubic root of 55393918 is about 381.2009970880.

The spelling of 55393918 in words is "fifty-five million, three hundred ninety-three thousand, nine hundred eighteen".