55530240 has 72 divisors (see below), whose sum is σ = 177361968. Its totient is φ = 14807040.

The previous prime is 55530227. The next prime is 55530253. The reversal of 55530240 is 4203555.

It is an interprime number because it is at equal distance from previous prime (55530227) and next prime (55530253).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55530240.

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 7 ways as a sum of consecutive naturals, for example, 3391 + ... + 11070.

Almost surely, 2^55530240 is an apocalyptic number.

It is an amenable number.

55530240 is an abundant number, since it is smaller than the sum of its proper divisors (121831728).

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

55530240 is a wasteful number, since it uses less digits than its factorization.

55530240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14485 (or 14471 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 55530240 is about 7451.8615124008. The cubic root of 55530240 is about 381.5134472248.

Adding to 55530240 its reverse (4203555), we get a palindrome (59733795).

The spelling of 55530240 in words is "fifty-five million, five hundred thirty thousand, two hundred forty".