51515200 has 84 divisors (see below), whose sum is σ = 138330432. Its totient is φ = 18726400.

The previous prime is 51515159. The next prime is 51515209. The reversal of 51515200 is 251515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16137 + ... + 19063.

Almost surely, 2^51515200 is an apocalyptic number.

51515200 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 51515200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69165216).

51515200 is an abundant number, since it is smaller than the sum of its proper divisors (86815232).

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

51515200 is a wasteful number, since it uses less digits than its factorization.

51515200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960 (or 2945 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 51515200 is about 7177.4090032546. The cubic root of 51515200 is about 372.0875425065.

Adding to 51515200 its reverse (251515), we get a palindrome (51766715).

It can be divided in two parts, 51515 and 200, that added together give a palindrome (51715).

The spelling of 51515200 in words is "fifty-one million, five hundred fifteen thousand, two hundred".