51430529 has 2 divisors, whose sum is σ = 51430530. Its totient is φ = 51430528.

The previous prime is 51430517. The next prime is 51430567. The reversal of 51430529 is 92503415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29593600 + 21836929 = 5440^2 + 4673^2 .

It is a cyclic number.

It is not a de Polignac number, because 51430529 - 2²⁰ = 50381953 is a prime.

It is a Chen prime.

It is equal to p_3081773 and since 51430529 and 3081773 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51430579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25715264 + 25715265.

It is an arithmetic number, because the mean of its divisors is an integer number (25715265).

Almost surely, 2^51430529 is an apocalyptic number.

It is an amenable number.

51430529 is a deficient number, since it is larger than the sum of its proper divisors (1).

51430529 is an equidigital number, since it uses as much as digits as its factorization.

51430529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 51430529 is about 7171.5081398545. The cubic root of 51430529 is about 371.8835748699.

The spelling of 51430529 in words is "fifty-one million, four hundred thirty thousand, five hundred twenty-nine".