55131200 has 42 divisors (see below), whose sum is σ = 135661146. Its totient is φ = 22051840.

The previous prime is 55131199. The next prime is 55131227. The reversal of 55131200 is 213155.

It can be written as a sum of positive squares in 3 ways, for example, as 5456896 + 49674304 = 2336^2 + 7048^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15629 + ... + 18828.

Almost surely, 2^55131200 is an apocalyptic number.

55131200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55131200 is an abundant number, since it is smaller than the sum of its proper divisors (80529946).

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

55131200 is a wasteful number, since it uses less digits than its factorization.

55131200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34479 (or 34464 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 55131200 is about 7425.0387204378. The cubic root of 55131200 is about 380.5973982877.

Adding to 55131200 its reverse (213155), we get a palindrome (55344355).

The spelling of 55131200 in words is "fifty-five million, one hundred thirty-one thousand, two hundred".