51550323543 has 24 divisors (see below), whose sum is σ = 75740006160. Its totient is φ = 33781737600.

The previous prime is 51550323533. The next prime is 51550323557. The reversal of 51550323543 is 34532305515.

51550323543 is a `hidden beast` number, since 5 + 1 + 550 + 32 + 35 + 43 = 666.

It is not a de Polignac number, because 51550323543 - 2⁵ = 51550323511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51550323498 and 51550323507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550323533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77646 + ... + 330347.

It is an arithmetic number, because the mean of its divisors is an integer number (3155833590).

Almost surely, 2^51550323543 is an apocalyptic number.

51550323543 is a deficient number, since it is larger than the sum of its proper divisors (24189682617).

51550323543 is a wasteful number, since it uses less digits than its factorization.

51550323543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408239 (or 408236 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 36.

The spelling of 51550323543 in words is "fifty-one billion, five hundred fifty million, three hundred twenty-three thousand, five hundred forty-three".