51086449 has 2 divisors, whose sum is σ = 51086450. Its totient is φ = 51086448.

The previous prime is 51086437. The next prime is 51086467. The reversal of 51086449 is 94468015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40640625 + 10445824 = 6375^2 + 3232^2 .

It is a cyclic number.

It is not a de Polignac number, because 51086449 - 2²⁵ = 17532017 is a prime.

It is not a weakly prime, because it can be changed into another prime (51086549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25543224 + 25543225.

It is an arithmetic number, because the mean of its divisors is an integer number (25543225).

Almost surely, 2^51086449 is an apocalyptic number.

It is an amenable number.

51086449 is a deficient number, since it is larger than the sum of its proper divisors (1).

51086449 is an equidigital number, since it uses as much as digits as its factorization.

51086449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 51086449 is about 7147.4785064385. The cubic root of 51086449 is about 371.0523946219.

The spelling of 51086449 in words is "fifty-one million, eighty-six thousand, four hundred forty-nine".