50516021 has 2 divisors, whose sum is σ = 50516022. Its totient is φ = 50516020.

The previous prime is 50515987. The next prime is 50516029. The reversal of 50516021 is 12061505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44823025 + 5692996 = 6695^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 50516021 - 2¹⁴ = 50499637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50515984 and 50516002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50516029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25258010 + 25258011.

It is an arithmetic number, because the mean of its divisors is an integer number (25258011).

Almost surely, 2^50516021 is an apocalyptic number.

It is an amenable number.

50516021 is a deficient number, since it is larger than the sum of its proper divisors (1).

50516021 is an equidigital number, since it uses as much as digits as its factorization.

50516021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 50516021 is about 7107.4623460135. The cubic root of 50516021 is about 369.6661732127. Note that the first 3 decimals are identical.

Adding to 50516021 its reverse (12061505), we get a palindrome (62577526).

The spelling of 50516021 in words is "fifty million, five hundred sixteen thousand, twenty-one".