51145250423 has 4 divisors (see below), whose sum is σ = 51145971360. Its totient is φ = 51144529488.

The previous prime is 51145250419. The next prime is 51145250467. The reversal of 51145250423 is 32405254115.

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 51145250423 - 2² = 51145250419 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 51145250423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145250413) 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, 240815 + ... + 400352.

It is an arithmetic number, because the mean of its divisors is an integer number (12786492840).

Almost surely, 2^51145250423 is an apocalyptic number.

51145250423 is a deficient number, since it is larger than the sum of its proper divisors (720937).

51145250423 is an equidigital number, since it uses as much as digits as its factorization.

51145250423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720936.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 51145250423 in words is "fifty-one billion, one hundred forty-five million, two hundred fifty thousand, four hundred twenty-three".