50711721 has 8 divisors (see below), whose sum is σ = 68021184. Its totient is φ = 33605040.

The previous prime is 50711707. The next prime is 50711723. The reversal of 50711721 is 12711705.

It is a happy number.

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

It is not a de Polignac number, because 50711721 - 2⁶ = 50711657 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 50711691 and 50711700.

It is not an unprimeable number, because it can be changed into a prime (50711723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50110 + ... + 51111.

It is an arithmetic number, because the mean of its divisors is an integer number (8502648).

Almost surely, 2^50711721 is an apocalyptic number.

It is an amenable number.

50711721 is a deficient number, since it is larger than the sum of its proper divisors (17309463).

50711721 is a wasteful number, since it uses less digits than its factorization.

50711721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101391.

The product of its (nonzero) digits is 490, while the sum is 24.

The square root of 50711721 is about 7121.2162584772. The cubic root of 50711721 is about 370.1429226278.

The spelling of 50711721 in words is "fifty million, seven hundred eleven thousand, seven hundred twenty-one".