50721313 has 2 divisors, whose sum is σ = 50721314. Its totient is φ = 50721312.

The previous prime is 50721299. The next prime is 50721323. The reversal of 50721313 is 31312705.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45468049 + 5253264 = 6743^2 + 2292^2 .

It is a cyclic number.

It is not a de Polignac number, because 50721313 - 2⁹ = 50720801 is a prime.

It is not a weakly prime, because it can be changed into another prime (50721323) 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, 25360656 + 25360657.

It is an arithmetic number, because the mean of its divisors is an integer number (25360657).

Almost surely, 2^50721313 is an apocalyptic number.

It is an amenable number.

50721313 is a deficient number, since it is larger than the sum of its proper divisors (1).

50721313 is an equidigital number, since it uses as much as digits as its factorization.

50721313 is an odious number, because the sum of its binary digits is odd.

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

The square root of 50721313 is about 7121.8897070932. The cubic root of 50721313 is about 370.1662583710.

The spelling of 50721313 in words is "fifty million, seven hundred twenty-one thousand, three hundred thirteen".