51724559 has 2 divisors, whose sum is σ = 51724560. Its totient is φ = 51724558.

The previous prime is 51724531. The next prime is 51724567. The reversal of 51724559 is 95542715.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51724559 - 2⁸ = 51724303 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51724529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25862279 + 25862280.

It is an arithmetic number, because the mean of its divisors is an integer number (25862280).

Almost surely, 2^51724559 is an apocalyptic number.

51724559 is a deficient number, since it is larger than the sum of its proper divisors (1).

51724559 is an equidigital number, since it uses as much as digits as its factorization.

51724559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63000, while the sum is 38.

The square root of 51724559 is about 7191.9787958531. The cubic root of 51724559 is about 372.5909187556.

The spelling of 51724559 in words is "fifty-one million, seven hundred twenty-four thousand, five hundred fifty-nine".