50556221 has 2 divisors, whose sum is σ = 50556222. Its totient is φ = 50556220.

The previous prime is 50556197. The next prime is 50556241. The reversal of 50556221 is 12265505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47265625 + 3290596 = 6875^2 + 1814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50556221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50556241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25278110 + 25278111.

It is an arithmetic number, because the mean of its divisors is an integer number (25278111).

Almost surely, 2^50556221 is an apocalyptic number.

It is an amenable number.

50556221 is a deficient number, since it is larger than the sum of its proper divisors (1).

50556221 is an equidigital number, since it uses as much as digits as its factorization.

50556221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 50556221 is about 7110.2897971883. The cubic root of 50556221 is about 369.7642057421.

The spelling of 50556221 in words is "fifty million, five hundred fifty-six thousand, two hundred twenty-one".