55005620 has 24 divisors (see below), whose sum is σ = 115668000. Its totient is φ = 21972512.

The previous prime is 55005583. The next prime is 55005623. The reversal of 55005620 is 2650055.

55005620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55005623) 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, 19031 + ... + 21729.

It is an arithmetic number, because the mean of its divisors is an integer number (4819500).

Almost surely, 2^55005620 is an apocalyptic number.

It is an amenable number.

55005620 is an abundant number, since it is smaller than the sum of its proper divisors (60662380).

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

55005620 is a wasteful number, since it uses less digits than its factorization.

55005620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3727 (or 3725 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55005620 is about 7416.5773777397. The cubic root of 55005620 is about 380.3081987215.

Adding to 55005620 its reverse (2650055), we get a palindrome (57655675).

The spelling of 55005620 in words is "fifty-five million, five thousand, six hundred twenty".