51253012516253 has 4 divisors (see below), whose sum is σ = 51253862642268. Its totient is φ = 51252162390240.

The previous prime is 51253012516171. The next prime is 51253012516273. The reversal of 51253012516253 is 35261521035215.

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 27143714461369 + 24109298054884 = 5209963^2 + 4910122^2 .

It is a cyclic number.

It is not a de Polignac number, because 51253012516253 - 2²⁰ = 51253011467677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51253012516253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51253012516273) 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, 424972568 + ... + 425093153.

It is an arithmetic number, because the mean of its divisors is an integer number (12813465660567).

Almost surely, 2^{51253012516253} is an apocalyptic number.

It is an amenable number.

51253012516253 is a deficient number, since it is larger than the sum of its proper divisors (850126015).

51253012516253 is an equidigital number, since it uses as much as digits as its factorization.

51253012516253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850126014.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 51253012516253 in words is "fifty-one trillion, two hundred fifty-three billion, twelve million, five hundred sixteen thousand, two hundred fifty-three".