51611617 has 2 divisors, whose sum is σ = 51611618. Its totient is φ = 51611616.

The previous prime is 51611611. The next prime is 51611627. The reversal of 51611617 is 71611615.

51611617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45037521 + 6574096 = 6711^2 + 2564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51611617 is a prime.

It is not a weakly prime, because it can be changed into another prime (51611611) 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, 25805808 + 25805809.

It is an arithmetic number, because the mean of its divisors is an integer number (25805809).

Almost surely, 2^51611617 is an apocalyptic number.

It is an amenable number.

51611617 is a deficient number, since it is larger than the sum of its proper divisors (1).

51611617 is an equidigital number, since it uses as much as digits as its factorization.

51611617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 28.

The square root of 51611617 is about 7184.1225629857. The cubic root of 51611617 is about 372.3195336210.

The spelling of 51611617 in words is "fifty-one million, six hundred eleven thousand, six hundred seventeen".