51724229 has 2 divisors, whose sum is σ = 51724230. Its totient is φ = 51724228.

The previous prime is 51724207. The next prime is 51724271. The reversal of 51724229 is 92242715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34692100 + 17032129 = 5890^2 + 4127^2 .

It is a cyclic number.

It is not a de Polignac number, because 51724229 - 2¹⁶ = 51658693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51724195 and 51724204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51724129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25862114 + 25862115.

It is an arithmetic number, because the mean of its divisors is an integer number (25862115).

Almost surely, 2^51724229 is an apocalyptic number.

It is an amenable number.

51724229 is a deficient number, since it is larger than the sum of its proper divisors (1).

51724229 is an equidigital number, since it uses as much as digits as its factorization.

51724229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 51724229 is about 7191.9558535909. The cubic root of 51724229 is about 372.5901263837.

The spelling of 51724229 in words is "fifty-one million, seven hundred twenty-four thousand, two hundred twenty-nine".