51510375427 has 4 divisors (see below), whose sum is σ = 58869000496. Its totient is φ = 44151750360.

The previous prime is 51510375419. The next prime is 51510375431. The reversal of 51510375427 is 72457301515.

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 51510375427 - 2³ = 51510375419 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 51510375427.

It is not an unprimeable number, because it can be changed into a prime (51510375457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3679312524 + ... + 3679312537.

It is an arithmetic number, because the mean of its divisors is an integer number (14717250124).

Almost surely, 2^51510375427 is an apocalyptic number.

51510375427 is a deficient number, since it is larger than the sum of its proper divisors (7358625069).

51510375427 is an equidigital number, since it uses as much as digits as its factorization.

51510375427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7358625068.

The product of its (nonzero) digits is 147000, while the sum is 40.

The spelling of 51510375427 in words is "fifty-one billion, five hundred ten million, three hundred seventy-five thousand, four hundred twenty-seven".