50175721 has 4 divisors (see below), whose sum is σ = 53127252. Its totient is φ = 47224192.

The previous prime is 50175707. The next prime is 50175731. The reversal of 50175721 is 12757105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12757105 = 5 ⋅2551421.

It can be written as a sum of positive squares in 2 ways, for example, as 41990400 + 8185321 = 6480^2 + 2861^2 .

It is a cyclic number.

It is not a de Polignac number, because 50175721 - 2¹³ = 50167529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50175721.

It is not an unprimeable number, because it can be changed into a prime (50175731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475740 + ... + 1475773.

It is an arithmetic number, because the mean of its divisors is an integer number (13281813).

Almost surely, 2^50175721 is an apocalyptic number.

It is an amenable number.

50175721 is a deficient number, since it is larger than the sum of its proper divisors (2951531).

50175721 is a wasteful number, since it uses less digits than its factorization.

50175721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951530.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 50175721 is about 7083.4822651010. The cubic root of 50175721 is about 368.8342197369.

The spelling of 50175721 in words is "fifty million, one hundred seventy-five thousand, seven hundred twenty-one".