55622540 has 24 divisors (see below), whose sum is σ = 117013680. Its totient is φ = 22209728.

The previous prime is 55622531. The next prime is 55622543. The reversal of 55622540 is 4522655.

55622540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55622543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10931 + ... + 15189.

It is an arithmetic number, because the mean of its divisors is an integer number (4875570).

Almost surely, 2^55622540 is an apocalyptic number.

It is an amenable number.

55622540 is an abundant number, since it is smaller than the sum of its proper divisors (61391140).

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

55622540 is a wasteful number, since it uses less digits than its factorization.

55622540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921 (or 4919 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 55622540 is about 7458.0520244900. The cubic root of 55622540 is about 381.7247086860.

The spelling of 55622540 in words is "fifty-five million, six hundred twenty-two thousand, five hundred forty".