55324540 has 12 divisors (see below), whose sum is σ = 116181576. Its totient is φ = 22129808.

The previous prime is 55324517. The next prime is 55324541. The reversal of 55324540 is 4542355.

It is a junction number, because it is equal to n+sod(n) for n = 55324499 and 55324508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55324541) 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, 1383094 + ... + 1383133.

It is an arithmetic number, because the mean of its divisors is an integer number (9681798).

Almost surely, 2^55324540 is an apocalyptic number.

It is an amenable number.

55324540 is an abundant number, since it is smaller than the sum of its proper divisors (60857036).

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

55324540 is a wasteful number, since it uses less digits than its factorization.

55324540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766236 (or 2766234 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 55324540 is about 7438.0467866235. The cubic root of 55324540 is about 381.0417857969.

Adding to 55324540 its reverse (4542355), we get a palindrome (59866895).

The spelling of 55324540 in words is "fifty-five million, three hundred twenty-four thousand, five hundred forty".