51547867253 has 4 divisors (see below), whose sum is σ = 51772967340. Its totient is φ = 51322767168.

The previous prime is 51547867249. The next prime is 51547867333. The reversal of 51547867253 is 35276874515.

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 28108869649 + 23438997604 = 167657^2 + 153098^2 .

It is a cyclic number.

It is not a de Polignac number, because 51547867253 - 2² = 51547867249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51547867195 and 51547867204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51547867453) 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, 112549700 + ... + 112550157.

It is an arithmetic number, because the mean of its divisors is an integer number (12943241835).

Almost surely, 2^51547867253 is an apocalyptic number.

It is an amenable number.

51547867253 is a deficient number, since it is larger than the sum of its proper divisors (225100087).

51547867253 is a wasteful number, since it uses less digits than its factorization.

51547867253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225100086.

The product of its digits is 7056000, while the sum is 53.

The spelling of 51547867253 in words is "fifty-one billion, five hundred forty-seven million, eight hundred sixty-seven thousand, two hundred fifty-three".