55512000 has 224 divisors, whose sum is σ = 204459840. Its totient is φ = 14745600.

The previous prime is 55511999. The next prime is 55512001. The reversal of 55512000 is 21555.

It is an interprime number because it is at equal distance from previous prime (55511999) and next prime (55512001).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55512001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215872 + ... + 216128.

Almost surely, 2^55512000 is an apocalyptic number.

55512000 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 55512000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102229920).

55512000 is an abundant number, since it is smaller than the sum of its proper divisors (148947840).

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

55512000 is a wasteful number, since it uses less digits than its factorization.

55512000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 55512000 is about 7450.6375566122. The cubic root of 55512000 is about 381.4716707841.

Adding to 55512000 its reverse (21555), we get a palindrome (55533555).

The spelling of 55512000 in words is "fifty-five million, five hundred twelve thousand".