55324240 has 20 divisors (see below), whose sum is σ = 128629044. Its totient is φ = 22129664.

The previous prime is 55324207. The next prime is 55324271. The reversal of 55324240 is 4242355.

It can be written as a sum of positive squares in 2 ways, for example, as 15936064 + 39388176 = 3992^2 + 6276^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345697 + ... + 345856.

Almost surely, 2^55324240 is an apocalyptic number.

It is an amenable number.

55324240 is an abundant number, since it is smaller than the sum of its proper divisors (73304804).

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

55324240 is a wasteful number, since it uses less digits than its factorization.

55324240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691566 (or 691560 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 55324240 is about 7438.0266200115. The cubic root of 55324240 is about 381.0410970565.

Adding to 55324240 its reverse (4242355), we get a palindrome (59566595).

The spelling of 55324240 in words is "fifty-five million, three hundred twenty-four thousand, two hundred forty".