50731213 has 8 divisors (see below), whose sum is σ = 57847608. Its totient is φ = 44073984.

The previous prime is 50731211. The next prime is 50731249. The reversal of 50731213 is 31213705.

It can be written as a sum of positive squares in 4 ways, for example, as 79524 + 50651689 = 282^2 + 7117^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50731213 - 2¹ = 50731211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50731211) 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 7 ways as a sum of consecutive naturals, for example, 114556 + ... + 114997.

It is an arithmetic number, because the mean of its divisors is an integer number (7230951).

Almost surely, 2^50731213 is an apocalyptic number.

It is an amenable number.

50731213 is a deficient number, since it is larger than the sum of its proper divisors (7116395).

50731213 is a wasteful number, since it uses less digits than its factorization.

50731213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229583.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 50731213 is about 7122.5847134309. The cubic root of 50731213 is about 370.1903403419.

Adding to 50731213 its reverse (31213705), we get a palindrome (81944918).

The spelling of 50731213 in words is "fifty million, seven hundred thirty-one thousand, two hundred thirteen".