50511521 has 2 divisors, whose sum is σ = 50511522. Its totient is φ = 50511520.

The previous prime is 50511499. The next prime is 50511523. The reversal of 50511521 is 12511505.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25361296 + 25150225 = 5036^2 + 5015^2 .

It is a cyclic number.

It is not a de Polignac number, because 50511521 - 2⁶ = 50511457 is a prime.

Together with 50511523, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 50511493 and 50511502.

It is not a weakly prime, because it can be changed into another prime (50511523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25255760 + 25255761.

It is an arithmetic number, because the mean of its divisors is an integer number (25255761).

Almost surely, 2^50511521 is an apocalyptic number.

It is an amenable number.

50511521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50511521 is an equidigital number, since it uses as much as digits as its factorization.

50511521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 50511521 is about 7107.1457702794. The cubic root of 50511521 is about 369.6551961857.

The spelling of 50511521 in words is "fifty million, five hundred eleven thousand, five hundred twenty-one".