51638339 has 2 divisors, whose sum is σ = 51638340. Its totient is φ = 51638338.

The previous prime is 51638309. The next prime is 51638341. The reversal of 51638339 is 93383615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51638339 - 2¹⁶ = 51572803 is a prime.

Together with 51638341, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51638309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25819169 + 25819170.

It is an arithmetic number, because the mean of its divisors is an integer number (25819170).

Almost surely, 2^51638339 is an apocalyptic number.

51638339 is a deficient number, since it is larger than the sum of its proper divisors (1).

51638339 is an equidigital number, since it uses as much as digits as its factorization.

51638339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 51638339 is about 7185.9821179850. The cubic root of 51638339 is about 372.3837788859.

The spelling of 51638339 in words is "fifty-one million, six hundred thirty-eight thousand, three hundred thirty-nine".