50991601 has 2 divisors, whose sum is σ = 50991602. Its totient is φ = 50991600.

The previous prime is 50991581. The next prime is 50991607. The reversal of 50991601 is 10619905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 11553201 = 6280^2 + 3399^2 .

It is a cyclic number.

It is not a de Polignac number, because 50991601 - 2¹¹ = 50989553 is a prime.

It is not a weakly prime, because it can be changed into another prime (50991607) 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, 25495800 + 25495801.

It is an arithmetic number, because the mean of its divisors is an integer number (25495801).

Almost surely, 2^50991601 is an apocalyptic number.

It is an amenable number.

50991601 is a deficient number, since it is larger than the sum of its proper divisors (1).

50991601 is an equidigital number, since it uses as much as digits as its factorization.

50991601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 50991601 is about 7140.8403567087. The cubic root of 50991601 is about 370.8226182262.

The spelling of 50991601 in words is "fifty million, nine hundred ninety-one thousand, six hundred one".