51262439 has 2 divisors, whose sum is σ = 51262440. Its totient is φ = 51262438.

The previous prime is 51262433. The next prime is 51262447. The reversal of 51262439 is 93426215.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51262439 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51262433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25631219 + 25631220.

It is an arithmetic number, because the mean of its divisors is an integer number (25631220).

Almost surely, 2^51262439 is an apocalyptic number.

51262439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51262439 is an equidigital number, since it uses as much as digits as its factorization.

51262439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 51262439 is about 7159.7792563738. The cubic root of 51262439 is about 371.4779912898.

The spelling of 51262439 in words is "fifty-one million, two hundred sixty-two thousand, four hundred thirty-nine".