55399194 has 16 divisors (see below), whose sum is σ = 123109440. Its totient is φ = 18466380.

The previous prime is 55399187. The next prime is 55399199. The reversal of 55399194 is 49199355.

It is a happy number.

55399194 is a `hidden beast` number, since 553 + 9 + 9 + 1 + 94 = 666.

55399194 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55399199) 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 7 ways as a sum of consecutive naturals, for example, 512902 + ... + 513009.

It is an arithmetic number, because the mean of its divisors is an integer number (7694340).

Almost surely, 2^55399194 is an apocalyptic number.

55399194 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

55399194 is an abundant number, since it is smaller than the sum of its proper divisors (67710246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55399194 is a wasteful number, since it uses less digits than its factorization.

55399194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025922 (or 1025916 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 55399194 is about 7443.0634821960. The cubic root of 55399194 is about 381.2130992145.

The spelling of 55399194 in words is "fifty-five million, three hundred ninety-nine thousand, one hundred ninety-four".