51025335513 has 4 divisors (see below), whose sum is σ = 68033780688. Its totient is φ = 34016890340.

The previous prime is 51025335469. The next prime is 51025335583. The reversal of 51025335513 is 31553352015.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51025335513 - 2⁹ = 51025335001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51025335583) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8504222583 + ... + 8504222588.

It is an arithmetic number, because the mean of its divisors is an integer number (17008445172).

Almost surely, 2^51025335513 is an apocalyptic number.

It is an amenable number.

51025335513 is a deficient number, since it is larger than the sum of its proper divisors (17008445175).

51025335513 is a wasteful number, since it uses less digits than its factorization.

51025335513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17008445174.

The product of its (nonzero) digits is 33750, while the sum is 33.

Adding to 51025335513 its reverse (31553352015), we get a palindrome (82578687528).

The spelling of 51025335513 in words is "fifty-one billion, twenty-five million, three hundred thirty-five thousand, five hundred thirteen".