50515391 has 2 divisors, whose sum is σ = 50515392. Its totient is φ = 50515390.

The previous prime is 50515373. The next prime is 50515417. The reversal of 50515391 is 19351505.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50515391 - 2¹⁰ = 50514367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50565391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25257695 + 25257696.

It is an arithmetic number, because the mean of its divisors is an integer number (25257696).

Almost surely, 2^50515391 is an apocalyptic number.

50515391 is a deficient number, since it is larger than the sum of its proper divisors (1).

50515391 is an equidigital number, since it uses as much as digits as its factorization.

50515391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 50515391 is about 7107.4180262596. The cubic root of 50515391 is about 369.6646364681.

Adding to 50515391 its reverse (19351505), we get a palindrome (69866896).

The spelling of 50515391 in words is "fifty million, five hundred fifteen thousand, three hundred ninety-one".