55145144 has 32 divisors (see below), whose sum is σ = 115246800. Its totient is φ = 24583680.

The previous prime is 55145137. The next prime is 55145183. The reversal of 55145144 is 44154155.

55145144 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 7 ways as a sum of consecutive naturals, for example, 8087 + ... + 13254.

Almost surely, 2^55145144 is an apocalyptic number.

It is an amenable number.

55145144 is an abundant number, since it is smaller than the sum of its proper divisors (60101656).

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

55145144 is a wasteful number, since it uses less digits than its factorization.

55145144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21383 (or 21379 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

The square root of 55145144 is about 7425.9776460746. The cubic root of 55145144 is about 380.6294829799.

Adding to 55145144 its reverse (44154155), we get a palindrome (99299299).

The spelling of 55145144 in words is "fifty-five million, one hundred forty-five thousand, one hundred forty-four".