51453451021200 has 120 divisors (see below), whose sum is σ = 164849409343488. Its totient is φ = 13718684720640.

The previous prime is 51453451021199. The next prime is 51453451021207. The reversal of 51453451021200 is 212015435415.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (51453451021207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3881622 + ... + 10861578.

Almost surely, 2^{51453451021200} is an apocalyptic number.

51453451021200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51453451021200 is an abundant number, since it is smaller than the sum of its proper divisors (113395958322288).

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

51453451021200 is a wasteful number, since it uses less digits than its factorization.

51453451021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6986121 (or 6986110 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 51453451021200 its reverse (212015435415), we get a palindrome (51665466456615).

The spelling of 51453451021200 in words is "fifty-one trillion, four hundred fifty-three billion, four hundred fifty-one million, twenty-one thousand, two hundred".