55335144 has 32 divisors (see below), whose sum is σ = 145620000. Its totient is φ = 17474112.

The previous prime is 55335143. The next prime is 55335149. The reversal of 55335144 is 44153355.

It is not an unprimeable number, because it can be changed into a prime (55335143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60219 + ... + 61130.

It is an arithmetic number, because the mean of its divisors is an integer number (4550625).

Almost surely, 2^55335144 is an apocalyptic number.

It is an amenable number.

55335144 is an abundant number, since it is smaller than the sum of its proper divisors (90284856).

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

55335144 is a wasteful number, since it uses less digits than its factorization.

55335144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121377 (or 121373 counting only the distinct ones).

The product of its digits is 18000, while the sum is 30.

The square root of 55335144 is about 7438.7595740150. The cubic root of 55335144 is about 381.0661288761.

Adding to 55335144 its reverse (44153355), we get a palindrome (99488499).

The spelling of 55335144 in words is "fifty-five million, three hundred thirty-five thousand, one hundred forty-four".