55420204 has 48 divisors (see below), whose sum is σ = 118214208. Its totient is φ = 22192128.

The previous prime is 55420201. The next prime is 55420229. The reversal of 55420204 is 40202455.

55420204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55420204² = 6142798022803232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55420201) 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 15 ways as a sum of consecutive naturals, for example, 82012 + ... + 82684.

It is an arithmetic number, because the mean of its divisors is an integer number (2462796).

Almost surely, 2^55420204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55420204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59107104).

55420204 is an abundant number, since it is smaller than the sum of its proper divisors (62794004).

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

55420204 is a wasteful number, since it uses less digits than its factorization.

55420204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 55420204 is about 7444.4747296233. The cubic root of 55420204 is about 381.2612844819.

Adding to 55420204 its reverse (40202455), we get a palindrome (95622659).

The spelling of 55420204 in words is "fifty-five million, four hundred twenty thousand, two hundred four".