51375425243 has 4 divisors (see below), whose sum is σ = 53609139408. Its totient is φ = 49141711080.

The previous prime is 51375425239. The next prime is 51375425249. The reversal of 51375425243 is 34252457315.

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

It is a cyclic number.

It is not a de Polignac number, because 51375425243 - 2² = 51375425239 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 51375425243.

It is not an unprimeable number, because it can be changed into a prime (51375425249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116857048 + ... + 1116857093.

It is an arithmetic number, because the mean of its divisors is an integer number (13402284852).

Almost surely, 2^51375425243 is an apocalyptic number.

51375425243 is a deficient number, since it is larger than the sum of its proper divisors (2233714165).

51375425243 is a wasteful number, since it uses less digits than its factorization.

51375425243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233714164.

The product of its digits is 504000, while the sum is 41.

The spelling of 51375425243 in words is "fifty-one billion, three hundred seventy-five million, four hundred twenty-five thousand, two hundred forty-three".