55163918 has 8 divisors (see below), whose sum is σ = 82810512. Its totient is φ = 27560416.

The previous prime is 55163917. The next prime is 55163921. The reversal of 55163918 is 81936155.

55163918 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 super-2 number, since 2×55163918² = 6086115698221448, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55163917) by changing a digit.

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, 7355 + ... + 12822.

It is an arithmetic number, because the mean of its divisors is an integer number (10351314).

Almost surely, 2^55163918 is an apocalyptic number.

55163918 is a deficient number, since it is larger than the sum of its proper divisors (27646594).

55163918 is a wasteful number, since it uses less digits than its factorization.

55163918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21546.

The product of its digits is 32400, while the sum is 38.

The square root of 55163918 is about 7427.2416144892. The cubic root of 55163918 is about 380.6726728036.

The spelling of 55163918 in words is "fifty-five million, one hundred sixty-three thousand, nine hundred eighteen".