51430039 has 2 divisors, whose sum is σ = 51430040. Its totient is φ = 51430038.

The previous prime is 51430019. The next prime is 51430081. The reversal of 51430039 is 93003415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51430039 - 2⁵ = 51430007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51429995 and 51430022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51430019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25715019 + 25715020.

It is an arithmetic number, because the mean of its divisors is an integer number (25715020).

Almost surely, 2^51430039 is an apocalyptic number.

51430039 is a deficient number, since it is larger than the sum of its proper divisors (1).

51430039 is an equidigital number, since it uses as much as digits as its factorization.

51430039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 51430039 is about 7171.4739768056. The cubic root of 51430039 is about 371.8823938365.

The spelling of 51430039 in words is "fifty-one million, four hundred thirty thousand, thirty-nine".