55139166 has 12 divisors (see below), whose sum is σ = 119468232. Its totient is φ = 18379716.

The previous prime is 55139087. The next prime is 55139221. The reversal of 55139166 is 66193155.

It is a self number, because there is not a number n which added to its sum of digits gives 55139166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1531626 + ... + 1531661.

It is an arithmetic number, because the mean of its divisors is an integer number (9955686).

Almost surely, 2^55139166 is an apocalyptic number.

55139166 is an abundant number, since it is smaller than the sum of its proper divisors (64329066).

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

55139166 is a wasteful number, since it uses less digits than its factorization.

55139166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063295 (or 3063292 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 55139166 is about 7425.5751292408. The cubic root of 55139166 is about 380.6157284580.

The spelling of 55139166 in words is "fifty-five million, one hundred thirty-nine thousand, one hundred sixty-six".