50591731 has 2 divisors, whose sum is σ = 50591732. Its totient is φ = 50591730.

The previous prime is 50591729. The next prime is 50591773. The reversal of 50591731 is 13719505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50591731 - 2¹ = 50591729 is a prime.

It is a super-2 number, since 2×50591731² = 5119046491152722, which contains 22 as substring.

Together with 50591729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 50591693 and 50591702.

It is not a weakly prime, because it can be changed into another prime (50591791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25295865 + 25295866.

It is an arithmetic number, because the mean of its divisors is an integer number (25295866).

Almost surely, 2^50591731 is an apocalyptic number.

50591731 is a deficient number, since it is larger than the sum of its proper divisors (1).

50591731 is an equidigital number, since it uses as much as digits as its factorization.

50591731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 50591731 is about 7112.7864441441. The cubic root of 50591731 is about 369.8507579257.

The spelling of 50591731 in words is "fifty million, five hundred ninety-one thousand, seven hundred thirty-one".