51545044243 has 16 divisors (see below), whose sum is σ = 65631273984. Its totient is φ = 39310392960.

The previous prime is 51545044231. The next prime is 51545044247. The reversal of 51545044243 is 34244054515.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51545044243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51545044247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7117830 + ... + 7125067.

It is an arithmetic number, because the mean of its divisors is an integer number (4101954624).

Almost surely, 2^51545044243 is an apocalyptic number.

51545044243 is a deficient number, since it is larger than the sum of its proper divisors (14086229741).

51545044243 is a wasteful number, since it uses less digits than its factorization.

51545044243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14242962.

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 51545044243 its reverse (34244054515), we get a palindrome (85789098758).

The spelling of 51545044243 in words is "fifty-one billion, five hundred forty-five million, forty-four thousand, two hundred forty-three".