55133142 has 32 divisors (see below), whose sum is σ = 118679904. Its totient is φ = 17011200.

The previous prime is 55133137. The next prime is 55133153. The reversal of 55133142 is 24133155.

55133142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1792 + ... + 10652.

It is an arithmetic number, because the mean of its divisors is an integer number (3708747).

Almost surely, 2^55133142 is an apocalyptic number.

55133142 is an abundant number, since it is smaller than the sum of its proper divisors (63546762).

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

55133142 is a wasteful number, since it uses less digits than its factorization.

55133142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8944.

The product of its digits is 1800, while the sum is 24.

The square root of 55133142 is about 7425.1694930150. The cubic root of 55133142 is about 380.6018670910.

Adding to 55133142 its reverse (24133155), we get a palindrome (79266297).

The spelling of 55133142 in words is "fifty-five million, one hundred thirty-three thousand, one hundred forty-two".