50565391 has 2 divisors, whose sum is σ = 50565392. Its totient is φ = 50565390.

The previous prime is 50565379. The next prime is 50565407. The reversal of 50565391 is 19356505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50565391 - 2¹¹ = 50563343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50565331) 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, 25282695 + 25282696.

It is an arithmetic number, because the mean of its divisors is an integer number (25282696).

Almost surely, 2^50565391 is an apocalyptic number.

50565391 is the 4106-th hex number.

50565391 is a deficient number, since it is larger than the sum of its proper divisors (1).

50565391 is an equidigital number, since it uses as much as digits as its factorization.

50565391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 50565391 is about 7110.9346080526. The cubic root of 50565391 is about 369.7865606091.

The spelling of 50565391 in words is "fifty million, five hundred sixty-five thousand, three hundred ninety-one".