51505135013 has 8 divisors (see below), whose sum is σ = 51748370688. Its totient is φ = 51262009344.

The previous prime is 51505134983. The next prime is 51505135057. The reversal of 51505135013 is 31053150515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51505135013 - 2¹² = 51505130917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51505135313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001381 + ... + 1051557.

It is an arithmetic number, because the mean of its divisors is an integer number (6468546336).

Almost surely, 2^51505135013 is an apocalyptic number.

It is an amenable number.

51505135013 is a deficient number, since it is larger than the sum of its proper divisors (243235675).

51505135013 is a wasteful number, since it uses less digits than its factorization.

51505135013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55003.

The product of its (nonzero) digits is 5625, while the sum is 29.

Adding to 51505135013 its reverse (31053150515), we get a palindrome (82558285528).

The spelling of 51505135013 in words is "fifty-one billion, five hundred five million, one hundred thirty-five thousand, thirteen".