55511204 has 36 divisors (see below), whose sum is σ = 114774912. Its totient is φ = 23011920.

The previous prime is 55511189. The next prime is 55511207. The reversal of 55511204 is 40211555.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55511204.

It is not an unprimeable number, because it can be changed into a prime (55511207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25877 + ... + 27939.

It is an arithmetic number, because the mean of its divisors is an integer number (3188192).

Almost surely, 2^55511204 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 55511204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57387456).

55511204 is an abundant number, since it is smaller than the sum of its proper divisors (59263708).

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

55511204 is a wasteful number, since it uses less digits than its factorization.

55511204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136 (or 2103 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 55511204 is about 7450.5841381733. The cubic root of 55511204 is about 381.4698474371.

Adding to 55511204 its reverse (40211555), we get a palindrome (95722759).

The spelling of 55511204 in words is "fifty-five million, five hundred eleven thousand, two hundred four".