51289223 has 2 divisors, whose sum is σ = 51289224. Its totient is φ = 51289222.

The previous prime is 51289219. The next prime is 51289229. The reversal of 51289223 is 32298215.

It is a happy number.

51289223 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 51289223 - 2² = 51289219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51289223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51289229) 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, 25644611 + 25644612.

It is an arithmetic number, because the mean of its divisors is an integer number (25644612).

Almost surely, 2^51289223 is an apocalyptic number.

51289223 is a deficient number, since it is larger than the sum of its proper divisors (1).

51289223 is an equidigital number, since it uses as much as digits as its factorization.

51289223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 51289223 is about 7161.6494608435. The cubic root of 51289223 is about 371.5426776005.

The spelling of 51289223 in words is "fifty-one million, two hundred eighty-nine thousand, two hundred twenty-three".