50577721 has 4 divisors (see below), whose sum is σ = 51146100. Its totient is φ = 50009344.

The previous prime is 50577673. The next prime is 50577731. The reversal of 50577721 is 12777505.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16810000 + 33767721 = 4100^2 + 5811^2 .

It is a cyclic number.

It is not a de Polignac number, because 50577721 - 2⁹ = 50577209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50577731) 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, 284056 + ... + 284233.

It is an arithmetic number, because the mean of its divisors is an integer number (12786525).

Almost surely, 2^50577721 is an apocalyptic number.

It is an amenable number.

50577721 is a deficient number, since it is larger than the sum of its proper divisors (568379).

50577721 is an equidigital number, since it uses as much as digits as its factorization.

50577721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568378.

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 50577721 is about 7111.8015298516. The cubic root of 50577721 is about 369.8166147473.

The spelling of 50577721 in words is "fifty million, five hundred seventy-seven thousand, seven hundred twenty-one".