51065449 has 2 divisors, whose sum is σ = 51065450. Its totient is φ = 51065448.

The previous prime is 51065437. The next prime is 51065489. The reversal of 51065449 is 94456015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50979600 + 85849 = 7140^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 51065449 - 2⁷ = 51065321 is a prime.

It is not a weakly prime, because it can be changed into another prime (51065489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25532724 + 25532725.

It is an arithmetic number, because the mean of its divisors is an integer number (25532725).

Almost surely, 2^51065449 is an apocalyptic number.

It is an amenable number.

51065449 is a deficient number, since it is larger than the sum of its proper divisors (1).

51065449 is an equidigital number, since it uses as much as digits as its factorization.

51065449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 51065449 is about 7146.0093058993. The cubic root of 51065449 is about 371.0015450758.

The spelling of 51065449 in words is "fifty-one million, sixty-five thousand, four hundred forty-nine".