55200540 has 48 divisors (see below), whose sum is σ = 156108960. Its totient is φ = 14572800.

The previous prime is 55200521. The next prime is 55200569. The reversal of 55200540 is 4500255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1506 + ... + 10614.

It is an arithmetic number, because the mean of its divisors is an integer number (3252270).

Almost surely, 2^55200540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55200540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78054480).

55200540 is an abundant number, since it is smaller than the sum of its proper divisors (100908420).

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

55200540 is a wasteful number, since it uses less digits than its factorization.

55200540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9222 (or 9220 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 55200540 is about 7429.7065890922. The cubic root of 55200540 is about 380.7568939831.

Adding to 55200540 its reverse (4500255), we get a palindrome (59700795).

The spelling of 55200540 in words is "fifty-five million, two hundred thousand, five hundred forty".