51009529 has 2 divisors, whose sum is σ = 51009530. Its totient is φ = 51009528.

The previous prime is 51009449. The next prime is 51009583. The reversal of 51009529 is 92590015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50979600 + 29929 = 7140^2 + 173^2 .

It is a cyclic number.

It is not a de Polignac number, because 51009529 - 2¹⁹ = 50485241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51009529.

It is not a weakly prime, because it can be changed into another prime (51009599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25504764 + 25504765.

It is an arithmetic number, because the mean of its divisors is an integer number (25504765).

Almost surely, 2^51009529 is an apocalyptic number.

It is an amenable number.

51009529 is a deficient number, since it is larger than the sum of its proper divisors (1).

51009529 is an equidigital number, since it uses as much as digits as its factorization.

51009529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 51009529 is about 7142.0955608281. The cubic root of 51009529 is about 370.8660719767.

The spelling of 51009529 in words is "fifty-one million, nine thousand, five hundred twenty-nine".