55512300 has 72 divisors (see below), whose sum is σ = 169086400. Its totient is φ = 14022720.

The previous prime is 55512299. The next prime is 55512329. The reversal of 55512300 is 321555.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 831 + ... + 10569.

Almost surely, 2^55512300 is an apocalyptic number.

55512300 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 55512300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84543200).

55512300 is an abundant number, since it is smaller than the sum of its proper divisors (113574100).

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

55512300 is a wasteful number, since it uses less digits than its factorization.

55512300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9775 (or 9768 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 55512300 is about 7450.6576890903. The cubic root of 55512300 is about 381.4723579706.

Adding to 55512300 its reverse (321555), we get a palindrome (55833855).

The spelling of 55512300 in words is "fifty-five million, five hundred twelve thousand, three hundred".