51245140423 has 2 divisors, whose sum is σ = 51245140424. Its totient is φ = 51245140422.

The previous prime is 51245140421. The next prime is 51245140447. The reversal of 51245140423 is 32404154215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51245140423 - 2¹ = 51245140421 is a prime.

Together with 51245140421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51245140421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25622570211 + 25622570212.

It is an arithmetic number, because the mean of its divisors is an integer number (25622570212).

Almost surely, 2^51245140423 is an apocalyptic number.

51245140423 is a deficient number, since it is larger than the sum of its proper divisors (1).

51245140423 is an equidigital number, since it uses as much as digits as its factorization.

51245140423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 51245140423 its reverse (32404154215), we get a palindrome (83649294638).

The spelling of 51245140423 in words is "fifty-one billion, two hundred forty-five million, one hundred forty thousand, four hundred twenty-three".