51355543133 has 4 divisors (see below), whose sum is σ = 51884981820. Its totient is φ = 50826104448.

The previous prime is 51355543103. The next prime is 51355543153. The reversal of 51355543133 is 33134555315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33134555315 = 5 ⋅6626911063.

It can be written as a sum of positive squares in 2 ways, for example, as 11462271844 + 39893271289 = 107062^2 + 199733^2 .

It is a cyclic number.

It is not a de Polignac number, because 51355543133 - 2⁶ = 51355543069 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 (51355543103) 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, 264719198 + ... + 264719391.

It is an arithmetic number, because the mean of its divisors is an integer number (12971245455).

Almost surely, 2^51355543133 is an apocalyptic number.

It is an amenable number.

51355543133 is a deficient number, since it is larger than the sum of its proper divisors (529438687).

51355543133 is an equidigital number, since it uses as much as digits as its factorization.

51355543133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529438686.

The product of its digits is 202500, while the sum is 38.

The spelling of 51355543133 in words is "fifty-one billion, three hundred fifty-five million, five hundred forty-three thousand, one hundred thirty-three".