50431291 has 4 divisors (see below), whose sum is σ = 50520184. Its totient is φ = 50342400.

The previous prime is 50431289. The next prime is 50431331. The reversal of 50431291 is 19213405.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 50431291 - 2¹ = 50431289 is a prime.

It is a super-2 number, since 2×50431291² = 5086630223853362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50431091) 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 in 3 ways as a sum of consecutive naturals, for example, 43590 + ... + 44731.

It is an arithmetic number, because the mean of its divisors is an integer number (12630046).

Almost surely, 2^50431291 is an apocalyptic number.

50431291 is a deficient number, since it is larger than the sum of its proper divisors (88893).

50431291 is an equidigital number, since it uses as much as digits as its factorization.

50431291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88892.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 50431291 is about 7101.4992079138. The cubic root of 50431291 is about 369.4593784672.

Adding to 50431291 its reverse (19213405), we get a palindrome (69644696).

The spelling of 50431291 in words is "fifty million, four hundred thirty-one thousand, two hundred ninety-one".