50816509 has 2 divisors, whose sum is σ = 50816510. Its totient is φ = 50816508.

The previous prime is 50816461. The next prime is 50816527. The reversal of 50816509 is 90561805.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43099225 + 7717284 = 6565^2 + 2778^2 .

It is a cyclic number.

It is not a de Polignac number, because 50816509 - 2⁹ = 50815997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50816539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25408254 + 25408255.

It is an arithmetic number, because the mean of its divisors is an integer number (25408255).

Almost surely, 2^50816509 is an apocalyptic number.

It is an amenable number.

50816509 is a deficient number, since it is larger than the sum of its proper divisors (1).

50816509 is an equidigital number, since it uses as much as digits as its factorization.

50816509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 50816509 is about 7128.5699126823. The cubic root of 50816509 is about 370.3976951009.

The spelling of 50816509 in words is "fifty million, eight hundred sixteen thousand, five hundred nine".