51724529 has 2 divisors, whose sum is σ = 51724530. Its totient is φ = 51724528.

The previous prime is 51724501. The next prime is 51724531. The reversal of 51724529 is 92542715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35724529 + 16000000 = 5977^2 + 4000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51724529 is a prime.

Together with 51724531, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51724559) 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, 25862264 + 25862265.

It is an arithmetic number, because the mean of its divisors is an integer number (25862265).

Almost surely, 2^51724529 is an apocalyptic number.

It is an amenable number.

51724529 is a deficient number, since it is larger than the sum of its proper divisors (1).

51724529 is an equidigital number, since it uses as much as digits as its factorization.

51724529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 51724529 is about 7191.9767101959. The cubic root of 51724529 is about 372.5908467219.

The spelling of 51724529 in words is "fifty-one million, seven hundred twenty-four thousand, five hundred twenty-nine".