51512305340 has 24 divisors (see below), whose sum is σ = 108183677280. Its totient is φ = 20603429568.

The previous prime is 51512305321. The next prime is 51512305379. The reversal of 51512305340 is 4350321515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214481 + ... + 386039.

It is an arithmetic number, because the mean of its divisors is an integer number (4507653220).

Almost surely, 2^51512305340 is an apocalyptic number.

It is an amenable number.

51512305340 is an abundant number, since it is smaller than the sum of its proper divisors (56671371940).

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

51512305340 is a wasteful number, since it uses less digits than its factorization.

51512305340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186581 (or 186579 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 51512305340 its reverse (4350321515), we get a palindrome (55862626855).

The spelling of 51512305340 in words is "fifty-one billion, five hundred twelve million, three hundred five thousand, three hundred forty".