51223615143 has 4 divisors (see below), whose sum is σ = 68298153528. Its totient is φ = 34149076760.

The previous prime is 51223615141. The next prime is 51223615159. The reversal of 51223615143 is 34151632215.

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 51223615143 - 2¹ = 51223615141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223615141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8537269188 + ... + 8537269193.

It is an arithmetic number, because the mean of its divisors is an integer number (17074538382).

Almost surely, 2^51223615143 is an apocalyptic number.

51223615143 is a deficient number, since it is larger than the sum of its proper divisors (17074538385).

51223615143 is a wasteful number, since it uses less digits than its factorization.

51223615143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17074538384.

The product of its digits is 21600, while the sum is 33.

The spelling of 51223615143 in words is "fifty-one billion, two hundred twenty-three million, six hundred fifteen thousand, one hundred forty-three".