51305504423 has 4 divisors (see below), whose sum is σ = 52146578328. Its totient is φ = 50464430520.

The previous prime is 51305504387. The next prime is 51305504429. The reversal of 51305504423 is 32440550315.

It is a happy number.

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 51305504423 - 2³⁰ = 50231762599 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 51305504423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51305504429) 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, 420536861 + ... + 420536982.

It is an arithmetic number, because the mean of its divisors is an integer number (13036644582).

Almost surely, 2^51305504423 is an apocalyptic number.

51305504423 is a deficient number, since it is larger than the sum of its proper divisors (841073905).

51305504423 is an equidigital number, since it uses as much as digits as its factorization.

51305504423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841073904.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 51305504423 in words is "fifty-one billion, three hundred five million, five hundred four thousand, four hundred twenty-three".