51513431015 has 8 divisors (see below), whose sum is σ = 61832267568. Its totient is φ = 41199977920.

The previous prime is 51513430963. The next prime is 51513431051. The reversal of 51513431015 is 51013431515.

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

It is not a de Polignac number, because 51513431015 - 2¹⁰ = 51513429991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1324781 + ... + 1363110.

It is an arithmetic number, because the mean of its divisors is an integer number (7729033446).

Almost surely, 2^51513431015 is an apocalyptic number.

51513431015 is a deficient number, since it is larger than the sum of its proper divisors (10318836553).

51513431015 is a wasteful number, since it uses less digits than its factorization.

51513431015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691729.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 51513431015 in words is "fifty-one billion, five hundred thirteen million, four hundred thirty-one thousand, fifteen".