51303243133 has 4 divisors (see below), whose sum is σ = 52554541788. Its totient is φ = 50051944480.

The previous prime is 51303243083. The next prime is 51303243151. The reversal of 51303243133 is 33134230315.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19438494084 + 31864749049 = 139422^2 + 178507^2 .

It is a cyclic number.

It is not a de Polignac number, because 51303243133 - 2³³ = 42713308541 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 (51303247133) 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, 625649266 + ... + 625649347.

It is an arithmetic number, because the mean of its divisors is an integer number (13138635447).

Almost surely, 2^51303243133 is an apocalyptic number.

It is an amenable number.

51303243133 is a deficient number, since it is larger than the sum of its proper divisors (1251298655).

51303243133 is a wasteful number, since it uses less digits than its factorization.

51303243133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251298654.

The product of its (nonzero) digits is 9720, while the sum is 28.

Adding to 51303243133 its reverse (33134230315), we get a palindrome (84437473448).

The spelling of 51303243133 in words is "fifty-one billion, three hundred three million, two hundred forty-three thousand, one hundred thirty-three".