51839933 has 2 divisors, whose sum is σ = 51839934. Its totient is φ = 51839932.

The previous prime is 51839929. The next prime is 51839939. The reversal of 51839933 is 33993815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31382404 + 20457529 = 5602^2 + 4523^2 .

It is a cyclic number.

It is not a de Polignac number, because 51839933 - 2² = 51839929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51839939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25919966 + 25919967.

It is an arithmetic number, because the mean of its divisors is an integer number (25919967).

Almost surely, 2^51839933 is an apocalyptic number.

It is an amenable number.

51839933 is a deficient number, since it is larger than the sum of its proper divisors (1).

51839933 is an equidigital number, since it uses as much as digits as its factorization.

51839933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 41.

The square root of 51839933 is about 7199.9953472207. The cubic root of 51839933 is about 372.8677400781.

The spelling of 51839933 in words is "fifty-one million, eight hundred thirty-nine thousand, nine hundred thirty-three".