50221861 has 2 divisors, whose sum is σ = 50221862. Its totient is φ = 50221860.

The previous prime is 50221819. The next prime is 50221877. The reversal of 50221861 is 16812205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48580900 + 1640961 = 6970^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 50221861 - 2⁷ = 50221733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50291861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25110930 + 25110931.

It is an arithmetic number, because the mean of its divisors is an integer number (25110931).

Almost surely, 2^50221861 is an apocalyptic number.

It is an amenable number.

50221861 is a deficient number, since it is larger than the sum of its proper divisors (1).

50221861 is an equidigital number, since it uses as much as digits as its factorization.

50221861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 50221861 is about 7086.7383894144. The cubic root of 50221861 is about 368.9472411797.

The spelling of 50221861 in words is "fifty million, two hundred twenty-one thousand, eight hundred sixty-one".