50171521 has 2 divisors, whose sum is σ = 50171522. Its totient is φ = 50171520.

The previous prime is 50171491. The next prime is 50171531. The reversal of 50171521 is 12517105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45158400 + 5013121 = 6720^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 50171521 - 2⁵ = 50171489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50171492 and 50171501.

It is not a weakly prime, because it can be changed into another prime (50171531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25085760 + 25085761.

It is an arithmetic number, because the mean of its divisors is an integer number (25085761).

Almost surely, 2^50171521 is an apocalyptic number.

It is an amenable number.

50171521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50171521 is an equidigital number, since it uses as much as digits as its factorization.

50171521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 50171521 is about 7083.1857945419. The cubic root of 50171521 is about 368.8239282591.

Adding to 50171521 its reverse (12517105), we get a palindrome (62688626).

The spelling of 50171521 in words is "fifty million, one hundred seventy-one thousand, five hundred twenty-one".