51225430520 has 32 divisors (see below), whose sum is σ = 125735148720. Its totient is φ = 18627429120.

The previous prime is 51225430511. The next prime is 51225430537. The reversal of 51225430520 is 2503452215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58210277 + ... + 58211156.

Almost surely, 2^51225430520 is an apocalyptic number.

It is an amenable number.

51225430520 is an abundant number, since it is smaller than the sum of its proper divisors (74509718200).

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

51225430520 is a wasteful number, since it uses less digits than its factorization.

51225430520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116421455 (or 116421451 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 51225430520 its reverse (2503452215), we get a palindrome (53728882735).

The spelling of 51225430520 in words is "fifty-one billion, two hundred twenty-five million, four hundred thirty thousand, five hundred twenty".