55540424 has 8 divisors (see below), whose sum is σ = 104138310. Its totient is φ = 27770208.

The previous prime is 55540409. The next prime is 55540427. The reversal of 55540424 is 42404555.

It can be written as a sum of positive squares in only one way, i.e., 30360100 + 25180324 = 5510^2 + 5018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (55540427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3471269 + ... + 3471284.

Almost surely, 2^55540424 is an apocalyptic number.

It is an amenable number.

55540424 is a deficient number, since it is larger than the sum of its proper divisors (48597886).

55540424 is a wasteful number, since it uses less digits than its factorization.

55540424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6942559 (or 6942555 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 55540424 is about 7452.5448002679. The cubic root of 55540424 is about 381.5367684245.

Adding to 55540424 its reverse (42404555), we get a palindrome (97944979).

The spelling of 55540424 in words is "fifty-five million, five hundred forty thousand, four hundred twenty-four".