51515540224000 has 192 divisors, whose sum is σ = 128583733824000. Its totient is φ = 20601032704000.

The previous prime is 51515540223991. The next prime is 51515540224007. The reversal of 51515540224000 is 42204551515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515540224007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1113320865 + ... + 1113367135.

It is an arithmetic number, because the mean of its divisors is an integer number (669706947000).

Almost surely, 2^{51515540224000} is an apocalyptic number.

51515540224000 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 51515540224000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64291866912000).

51515540224000 is an abundant number, since it is smaller than the sum of its proper divisors (77068193600000).

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

51515540224000 is an equidigital number, since it uses as much as digits as its factorization.

51515540224000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50657 (or 50627 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

Adding to 51515540224000 its reverse (42204551515), we get a palindrome (51557744775515).

The spelling of 51515540224000 in words is "fifty-one trillion, five hundred fifteen billion, five hundred forty million, two hundred twenty-four thousand".