51590000239 has 2 divisors, whose sum is σ = 51590000240. Its totient is φ = 51590000238.

The previous prime is 51590000237. The next prime is 51590000279. The reversal of 51590000239 is 93200009515.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51590000239 - 2¹ = 51590000237 is a prime.

Together with 51590000237, 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 (51590000237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25795000119 + 25795000120.

It is an arithmetic number, because the mean of its divisors is an integer number (25795000120).

Almost surely, 2^51590000239 is an apocalyptic number.

51590000239 is a deficient number, since it is larger than the sum of its proper divisors (1).

51590000239 is an equidigital number, since it uses as much as digits as its factorization.

51590000239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 34.

The spelling of 51590000239 in words is "fifty-one billion, five hundred ninety million, two hundred thirty-nine", and thus it is an aban number.