51560009 has 2 divisors, whose sum is σ = 51560010. Its totient is φ = 51560008.

The previous prime is 51559961. The next prime is 51560023. The reversal of 51560009 is 90006515.

51560009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51337225 + 222784 = 7165^2 + 472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51560009 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51560009.

It is not a weakly prime, because it can be changed into another prime (51562009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25780004 + 25780005.

It is an arithmetic number, because the mean of its divisors is an integer number (25780005).

Almost surely, 2^51560009 is an apocalyptic number.

It is an amenable number.

51560009 is a deficient number, since it is larger than the sum of its proper divisors (1).

51560009 is an equidigital number, since it uses as much as digits as its factorization.

51560009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 51560009 is about 7180.5298551012. The cubic root of 51560009 is about 372.1953944213.

The spelling of 51560009 in words is "fifty-one million, five hundred sixty thousand, nine".