55533421200 has 240 divisors, whose sum is σ = 181856503296. Its totient is φ = 14480793600.

The previous prime is 55533421199. The next prime is 55533421201. The reversal of 55533421200 is 212433555.

It is an interprime number because it is at equal distance from previous prime (55533421199) and next prime (55533421201).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (55533421201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21431905 + ... + 21434495.

Almost surely, 2^55533421200 is an apocalyptic number.

55533421200 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 55533421200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90928251648).

55533421200 is an abundant number, since it is smaller than the sum of its proper divisors (126323082096).

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

55533421200 is a wasteful number, since it uses less digits than its factorization.

55533421200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002 (or 2991 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 55533421200 its reverse (212433555), we get a palindrome (55745854755).

The spelling of 55533421200 in words is "fifty-five billion, five hundred thirty-three million, four hundred twenty-one thousand, two hundred".