51840200 has 24 divisors (see below), whose sum is σ = 120528930. Its totient is φ = 20736000.

The previous prime is 51840181. The next prime is 51840203. The reversal of 51840200 is 204815.

It can be written as a sum of positive squares in 3 ways, for example, as 33709636 + 18130564 = 5806^2 + 4258^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (51840203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129401 + ... + 129800.

Almost surely, 2^51840200 is an apocalyptic number.

51840200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51840200 is an abundant number, since it is smaller than the sum of its proper divisors (68688730).

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

51840200 is a wasteful number, since it uses less digits than its factorization.

51840200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259217 (or 259208 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 51840200 is about 7200.0138888755. The cubic root of 51840200 is about 372.8683802250.

The spelling of 51840200 in words is "fifty-one million, eight hundred forty thousand, two hundred".