51543551513 has 8 divisors (see below), whose sum is σ = 53588784480. Its totient is φ = 49535845920.

The previous prime is 51543551459. The next prime is 51543551531. The reversal of 51543551513 is 31515534515.

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 51543551513 - 2²² = 51539357209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51543556513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9379043 + ... + 9384536.

It is an arithmetic number, because the mean of its divisors is an integer number (6698598060).

Almost surely, 2^51543551513 is an apocalyptic number.

It is an amenable number.

51543551513 is a deficient number, since it is larger than the sum of its proper divisors (2045232967).

51543551513 is a wasteful number, since it uses less digits than its factorization.

51543551513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18763687.

The product of its digits is 112500, while the sum is 38.

The spelling of 51543551513 in words is "fifty-one billion, five hundred forty-three million, five hundred fifty-one thousand, five hundred thirteen".