55200240 has 60 divisors (see below), whose sum is σ = 185383224. Its totient is φ = 14719872.

The previous prime is 55200239. The next prime is 55200269. The reversal of 55200240 is 4200255.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37614 + ... + 39053.

Almost surely, 2^55200240 is an apocalyptic number.

It is an amenable number.

55200240 is an abundant number, since it is smaller than the sum of its proper divisors (130182984).

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

55200240 is a wasteful number, since it uses less digits than its factorization.

55200240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76686 (or 76677 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 55200240 is about 7429.6863998422. The cubic root of 55200240 is about 380.7562042116.

Adding to 55200240 its reverse (4200255), we get a palindrome (59400495).

The spelling of 55200240 in words is "fifty-five million, two hundred thousand, two hundred forty".