50221609 has 2 divisors, whose sum is σ = 50221610. Its totient is φ = 50221608.

The previous prime is 50221573. The next prime is 50221681. The reversal of 50221609 is 90612205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46717225 + 3504384 = 6835^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 50221609 - 2⁹ = 50221097 is a prime.

It is equal to p_3013585 and since 50221609 and 3013585 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (50221909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25110804 + 25110805.

It is an arithmetic number, because the mean of its divisors is an integer number (25110805).

Almost surely, 2^50221609 is an apocalyptic number.

It is an amenable number.

50221609 is a deficient number, since it is larger than the sum of its proper divisors (1).

50221609 is an equidigital number, since it uses as much as digits as its factorization.

50221609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 50221609 is about 7086.7206097038. The cubic root of 50221609 is about 368.9466240855.

The spelling of 50221609 in words is "fifty million, two hundred twenty-one thousand, six hundred nine".