51335513423 has 2 divisors, whose sum is σ = 51335513424. Its totient is φ = 51335513422.

The previous prime is 51335513419. The next prime is 51335513447. The reversal of 51335513423 is 32431553315.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51335513423 - 2² = 51335513419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51335513473) 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 as a sum of consecutive naturals, namely, 25667756711 + 25667756712.

It is an arithmetic number, because the mean of its divisors is an integer number (25667756712).

Almost surely, 2^51335513423 is an apocalyptic number.

51335513423 is a deficient number, since it is larger than the sum of its proper divisors (1).

51335513423 is an equidigital number, since it uses as much as digits as its factorization.

51335513423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 35.

The spelling of 51335513423 in words is "fifty-one billion, three hundred thirty-five million, five hundred thirteen thousand, four hundred twenty-three".