55330240 has 112 divisors (see below), whose sum is σ = 159544512. Its totient is φ = 17842176.

The previous prime is 55330237. The next prime is 55330271. The reversal of 55330240 is 4203355.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×55330240² = 6122870916915200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37354 + ... + 38806.

Almost surely, 2^55330240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55330240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79772256).

55330240 is an abundant number, since it is smaller than the sum of its proper divisors (104214272).

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

55330240 is a wasteful number, since it uses less digits than its factorization.

55330240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 55330240 is about 7438.4299418627. The cubic root of 55330240 is about 381.0548713920.

Adding to 55330240 its reverse (4203355), we get a palindrome (59533595).

The spelling of 55330240 in words is "fifty-five million, three hundred thirty thousand, two hundred forty".