51343521503 has 4 divisors (see below), whose sum is σ = 52046857488. Its totient is φ = 50640185520.

The previous prime is 51343521461. The next prime is 51343521521. The reversal of 51343521503 is 30512534315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51343521503 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 51343521503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343521583) 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, 351667883 + ... + 351668028.

It is an arithmetic number, because the mean of its divisors is an integer number (13011714372).

Almost surely, 2^51343521503 is an apocalyptic number.

51343521503 is a deficient number, since it is larger than the sum of its proper divisors (703335985).

51343521503 is an equidigital number, since it uses as much as digits as its factorization.

51343521503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703335984.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 51343521503 in words is "fifty-one billion, three hundred forty-three million, five hundred twenty-one thousand, five hundred three".