51500142120731 has 4 divisors (see below), whose sum is σ = 51769776372864. Its totient is φ = 51230507868600.

The previous prime is 51500142120701. The next prime is 51500142120773. The reversal of 51500142120731 is 13702124100515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51500142120731 - 2¹⁴ = 51500142104347 is a prime.

It is a super-2 number, since 2×51500142120731² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51500142120701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134817125780 + ... + 134817126161.

It is an arithmetic number, because the mean of its divisors is an integer number (12942444093216).

Almost surely, 2^{51500142120731} is an apocalyptic number.

51500142120731 is a deficient number, since it is larger than the sum of its proper divisors (269634252133).

51500142120731 is a wasteful number, since it uses less digits than its factorization.

51500142120731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269634252132.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 51500142120731 in words is "fifty-one trillion, five hundred billion, one hundred forty-two million, one hundred twenty thousand, seven hundred thirty-one".