51720294168143 has 4 divisors (see below), whose sum is σ = 51720539602368. Its totient is φ = 51720048733920.

The previous prime is 51720294168133. The next prime is 51720294168181. The reversal of 51720294168143 is 34186149202715.

51720294168143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51720294168143 - 2³⁶ = 51651574691407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51720294168133) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 122400746 + ... + 122822567.

It is an arithmetic number, because the mean of its divisors is an integer number (12930134900592).

It is a 1-persistent number, because it is pandigital, but 2⋅51720294168143 = 103440588336286 is not.

Almost surely, 2^{51720294168143} is an apocalyptic number.

51720294168143 is a deficient number, since it is larger than the sum of its proper divisors (245434225).

51720294168143 is a wasteful number, since it uses less digits than its factorization.

51720294168143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245434224.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 51720294168143 in words is "fifty-one trillion, seven hundred twenty billion, two hundred ninety-four million, one hundred sixty-eight thousand, one hundred forty-three".