55218300 has 72 divisors (see below), whose sum is σ = 161406336. Its totient is φ = 14573760.

The previous prime is 55218287. The next prime is 55218301. The reversal of 55218300 is 381255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55218301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30007 + ... + 31793.

Almost surely, 2^55218300 is an apocalyptic number.

55218300 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 55218300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80703168).

55218300 is an abundant number, since it is smaller than the sum of its proper divisors (106188036).

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

55218300 is a wasteful number, since it uses less digits than its factorization.

55218300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907 (or 1900 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 55218300 is about 7430.9016949493. The cubic root of 55218300 is about 380.7977240025.

Adding to 55218300 its reverse (381255), we get a palindrome (55599555).

The spelling of 55218300 in words is "fifty-five million, two hundred eighteen thousand, three hundred".