55223400 has 96 divisors (see below), whose sum is σ = 176774400. Its totient is φ = 14246400.

The previous prime is 55223381. The next prime is 55223401. The reversal of 55223400 is 432255.

It is not an unprimeable number, because it can be changed into a prime (55223401) 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 23 ways as a sum of consecutive naturals, for example, 17116 + ... + 20084.

It is an arithmetic number, because the mean of its divisors is an integer number (1841400).

Almost surely, 2^55223400 is an apocalyptic number.

55223400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55223400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88387200).

55223400 is an abundant number, since it is smaller than the sum of its proper divisors (121551000).

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

55223400 is a wasteful number, since it uses less digits than its factorization.

55223400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019 (or 3010 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 55223400 is about 7431.2448486105. The cubic root of 55223400 is about 380.8094472211.

Adding to 55223400 its reverse (432255), we get a palindrome (55655655).

The spelling of 55223400 in words is "fifty-five million, two hundred twenty-three thousand, four hundred".