50357721 has 4 divisors (see below), whose sum is σ = 67143632. Its totient is φ = 33571812.

The previous prime is 50357719. The next prime is 50357743. The reversal of 50357721 is 12775305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 50357721 - 2¹ = 50357719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50357701) 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, 8392951 + ... + 8392956.

It is an arithmetic number, because the mean of its divisors is an integer number (16785908).

Almost surely, 2^50357721 is an apocalyptic number.

It is an amenable number.

50357721 is a deficient number, since it is larger than the sum of its proper divisors (16785911).

50357721 is a wasteful number, since it uses less digits than its factorization.

50357721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16785910.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 50357721 is about 7096.3174252566. The cubic root of 50357721 is about 369.2796332199.

The spelling of 50357721 in words is "fifty million, three hundred fifty-seven thousand, seven hundred twenty-one".