51245339 has 2 divisors, whose sum is σ = 51245340. Its totient is φ = 51245338.

The previous prime is 51245317. The next prime is 51245371. The reversal of 51245339 is 93354215.

It is an a-pointer prime, because the next prime (51245371) can be obtained adding 51245339 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51245339 - 2⁸ = 51245083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51245309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25622669 + 25622670.

It is an arithmetic number, because the mean of its divisors is an integer number (25622670).

Almost surely, 2^51245339 is an apocalyptic number.

51245339 is a deficient number, since it is larger than the sum of its proper divisors (1).

51245339 is an equidigital number, since it uses as much as digits as its factorization.

51245339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 32.

The square root of 51245339 is about 7158.5849858754. The cubic root of 51245339 is about 371.4366811205.

The spelling of 51245339 in words is "fifty-one million, two hundred forty-five thousand, three hundred thirty-nine".