51029230247 has 2 divisors, whose sum is σ = 51029230248. Its totient is φ = 51029230246.

The previous prime is 51029230243. The next prime is 51029230253. The reversal of 51029230247 is 74203292015.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51029230247 - 2² = 51029230243 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51029230243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25514615123 + 25514615124.

It is an arithmetic number, because the mean of its divisors is an integer number (25514615124).

Almost surely, 2^51029230247 is an apocalyptic number.

51029230247 is a deficient number, since it is larger than the sum of its proper divisors (1).

51029230247 is an equidigital number, since it uses as much as digits as its factorization.

51029230247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 51029230247 in words is "fifty-one billion, twenty-nine million, two hundred thirty thousand, two hundred forty-seven".