55540432 has 20 divisors (see below), whose sum is σ = 107733060. Its totient is φ = 27738368.

The previous prime is 55540427. The next prime is 55540451. The reversal of 55540432 is 23404555.

It can be written as a sum of positive squares in 2 ways, for example, as 34527376 + 21013056 = 5876^2 + 4584^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55540432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19278 + ... + 21970.

It is an arithmetic number, because the mean of its divisors is an integer number (5386653).

Almost surely, 2^55540432 is an apocalyptic number.

It is an amenable number.

55540432 is a deficient number, since it is larger than the sum of its proper divisors (52192628).

55540432 is a wasteful number, since it uses less digits than its factorization.

55540432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990 (or 3984 counting only the distinct ones).

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

The square root of 55540432 is about 7452.5453369973. The cubic root of 55540432 is about 381.5367867432.

Adding to 55540432 its reverse (23404555), we get a palindrome (78944987).

The spelling of 55540432 in words is "fifty-five million, five hundred forty thousand, four hundred thirty-two".