55142188 has 6 divisors (see below), whose sum is σ = 96498836. Its totient is φ = 27571092.

The previous prime is 55142179. The next prime is 55142189. The reversal of 55142188 is 88124155.

55142188 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 (55142189) 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 as a sum of consecutive naturals, namely, 6892770 + ... + 6892777.

Almost surely, 2^55142188 is an apocalyptic number.

It is an amenable number.

55142188 is a deficient number, since it is larger than the sum of its proper divisors (41356648).

55142188 is a wasteful number, since it uses less digits than its factorization.

55142188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13785551 (or 13785549 counting only the distinct ones).

The product of its digits is 12800, while the sum is 34.

The square root of 55142188 is about 7425.7786123746. The cubic root of 55142188 is about 380.6226817715.

The spelling of 55142188 in words is "fifty-five million, one hundred forty-two thousand, one hundred eighty-eight".