55115600 has 60 divisors (see below), whose sum is σ = 133217664. Its totient is φ = 21912960.

The previous prime is 55115591. The next prime is 55115611. The reversal of 55115600 is 651155.

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, 90497 + ... + 91103.

Almost surely, 2^55115600 is an apocalyptic number.

55115600 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 55115600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66608832).

55115600 is an abundant number, since it is smaller than the sum of its proper divisors (78102064).

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

55115600 is a wasteful number, since it uses less digits than its factorization.

55115600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 55115600 is about 7423.9881465423. The cubic root of 55115600 is about 380.5614967805.

Adding to 55115600 its reverse (651155), we get a palindrome (55766755).

It can be divided in two parts, 5511 and 5600, that added together give a palindrome (11111).

The spelling of 55115600 in words is "fifty-five million, one hundred fifteen thousand, six hundred".