51513445200 has 180 divisors, whose sum is σ = 191956136640. Its totient is φ = 11774488320.

The previous prime is 51513445199. The next prime is 51513445303. The reversal of 51513445200 is 254431515.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 379240 + ... + 496839.

Almost surely, 2^51513445200 is an apocalyptic number.

51513445200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51513445200 is an abundant number, since it is smaller than the sum of its proper divisors (140442691440).

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

51513445200 is a wasteful number, since it uses less digits than its factorization.

51513445200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876114 (or 876096 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 51513445200 its reverse (254431515), we get a palindrome (51767876715).

The spelling of 51513445200 in words is "fifty-one billion, five hundred thirteen million, four hundred forty-five thousand, two hundred".