51430339 has 4 divisors (see below), whose sum is σ = 52198024. Its totient is φ = 50662656.

The previous prime is 51430319. The next prime is 51430349. The reversal of 51430339 is 93303415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93303415 = 5 ⋅18660683.

It is a cyclic number.

It is not a de Polignac number, because 51430339 - 2⁵ = 51430307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51430319) 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 in 3 ways as a sum of consecutive naturals, for example, 383742 + ... + 383875.

It is an arithmetic number, because the mean of its divisors is an integer number (13049506).

Almost surely, 2^51430339 is an apocalyptic number.

51430339 is a deficient number, since it is larger than the sum of its proper divisors (767685).

51430339 is an equidigital number, since it uses as much as digits as its factorization.

51430339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767684.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 51430339 is about 7171.4948929773. The cubic root of 51430339 is about 371.8831169191.

The spelling of 51430339 in words is "fifty-one million, four hundred thirty thousand, three hundred thirty-nine".