51515500143 has 8 divisors (see below), whose sum is σ = 68830732800. Its totient is φ = 34271967128.

The previous prime is 51515500139. The next prime is 51515500193. The reversal of 51515500143 is 34100551515.

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 51515500143 - 2² = 51515500139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51515500143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515500123) 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, 17923233 + ... + 17926106.

It is an arithmetic number, because the mean of its divisors is an integer number (8603841600).

Almost surely, 2^51515500143 is an apocalyptic number.

51515500143 is a deficient number, since it is larger than the sum of its proper divisors (17315232657).

51515500143 is a wasteful number, since it uses less digits than its factorization.

51515500143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35849821.

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 51515500143 in words is "fifty-one billion, five hundred fifteen million, five hundred thousand, one hundred forty-three".