51263939 has 2 divisors, whose sum is σ = 51263940. Its totient is φ = 51263938.

The previous prime is 51263923. The next prime is 51263963. The reversal of 51263939 is 93936215.

51263939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51263939 - 2⁴ = 51263923 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (51263999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25631969 + 25631970.

It is an arithmetic number, because the mean of its divisors is an integer number (25631970).

Almost surely, 2^51263939 is an apocalyptic number.

51263939 is a deficient number, since it is larger than the sum of its proper divisors (1).

51263939 is an equidigital number, since it uses as much as digits as its factorization.

51263939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 38.

The square root of 51263939 is about 7159.8840074403. The cubic root of 51263939 is about 371.4816145506.

The spelling of 51263939 in words is "fifty-one million, two hundred sixty-three thousand, nine hundred thirty-nine".