50217561 has 12 divisors (see below), whose sum is σ = 73215792. Its totient is φ = 33164856.

The previous prime is 50217527. The next prime is 50217577. The reversal of 50217561 is 16571205.

It is not a de Polignac number, because 50217561 - 2⁹ = 50217049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50217511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25111 + ... + 27036.

It is an arithmetic number, because the mean of its divisors is an integer number (6101316).

Almost surely, 2^50217561 is an apocalyptic number.

It is an amenable number.

50217561 is a deficient number, since it is larger than the sum of its proper divisors (22998231).

50217561 is a wasteful number, since it uses less digits than its factorization.

50217561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52260 (or 52257 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 50217561 is about 7086.4349993491. The cubic root of 50217561 is about 368.9367111145.

Adding to 50217561 its reverse (16571205), we get a palindrome (66788766).

The spelling of 50217561 in words is "fifty million, two hundred seventeen thousand, five hundred sixty-one".