51530931200 has 264 divisors, whose sum is σ = 146661818400. Its totient is φ = 17585602560.

The previous prime is 51530931113. The next prime is 51530931217. The reversal of 51530931200 is 213903515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48204266 + ... + 48205334.

Almost surely, 2^51530931200 is an apocalyptic number.

51530931200 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 51530931200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73330909200).

51530931200 is an abundant number, since it is smaller than the sum of its proper divisors (95130887200).

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

51530931200 is a wasteful number, since it uses less digits than its factorization.

51530931200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 29.

The spelling of 51530931200 in words is "fifty-one billion, five hundred thirty million, nine hundred thirty-one thousand, two hundred".