55002144 has 24 divisors (see below), whose sum is σ = 144380880. Its totient is φ = 18334016.

The previous prime is 55002139. The next prime is 55002149. The reversal of 55002144 is 44120055.

It is an interprime number because it is at equal distance from previous prime (55002139) and next prime (55002149).

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55002144.

It is not an unprimeable number, because it can be changed into a prime (55002149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286374 + ... + 286565.

It is an arithmetic number, because the mean of its divisors is an integer number (6015870).

Almost surely, 2^55002144 is an apocalyptic number.

It is an amenable number.

55002144 is an abundant number, since it is smaller than the sum of its proper divisors (89378736).

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

55002144 is a wasteful number, since it uses less digits than its factorization.

55002144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572952 (or 572944 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 55002144 is about 7416.3430341375. The cubic root of 55002144 is about 380.3001875453.

Adding to 55002144 its reverse (44120055), we get a palindrome (99122199).

The spelling of 55002144 in words is "fifty-five million, two thousand, one hundred forty-four".