50561491 has 2 divisors, whose sum is σ = 50561492. Its totient is φ = 50561490.

The previous prime is 50561473. The next prime is 50561513. The reversal of 50561491 is 19416505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50561491 - 2⁷ = 50561363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50561431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25280745 + 25280746.

It is an arithmetic number, because the mean of its divisors is an integer number (25280746).

Almost surely, 2^50561491 is an apocalyptic number.

50561491 is a deficient number, since it is larger than the sum of its proper divisors (1).

50561491 is an equidigital number, since it uses as much as digits as its factorization.

50561491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 50561491 is about 7110.6603772083. The cubic root of 50561491 is about 369.7770534169. Note that the first 3 decimals are identical.

Adding to 50561491 its reverse (19416505), we get a palindrome (69977996).

The spelling of 50561491 in words is "fifty million, five hundred sixty-one thousand, four hundred ninety-one".