51942254543 has 4 divisors (see below), whose sum is σ = 51965028528. Its totient is φ = 51919480560.

The previous prime is 51942254519. The next prime is 51942254593. The reversal of 51942254543 is 34545224915.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51942254543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51942254494 and 51942254503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51942254513) 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, 11383571 + ... + 11388132.

It is an arithmetic number, because the mean of its divisors is an integer number (12991257132).

Almost surely, 2^51942254543 is an apocalyptic number.

51942254543 is a deficient number, since it is larger than the sum of its proper divisors (22773985).

51942254543 is a wasteful number, since it uses less digits than its factorization.

51942254543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22773984.

The product of its digits is 864000, while the sum is 44.

The spelling of 51942254543 in words is "fifty-one billion, nine hundred forty-two million, two hundred fifty-four thousand, five hundred forty-three".