50717021 has 4 divisors (see below), whose sum is σ = 50940672. Its totient is φ = 50493372.

The previous prime is 50716993. The next prime is 50717033. The reversal of 50717021 is 12071705.

It is a happy number.

50717021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12071705 = 5 ⋅2414341.

It is a cyclic number.

It is not a de Polignac number, because 50717021 - 2⁶ = 50716957 is a prime.

It is a super-2 number, since 2×50717021² = 5144432438228882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50717221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111485 + ... + 111938.

It is an arithmetic number, because the mean of its divisors is an integer number (12735168).

Almost surely, 2^50717021 is an apocalyptic number.

It is an amenable number.

50717021 is a deficient number, since it is larger than the sum of its proper divisors (223651).

50717021 is a wasteful number, since it uses less digits than its factorization.

50717021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223650.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 50717021 is about 7121.5883761981. The cubic root of 50717021 is about 370.1558170114.

Adding to 50717021 its reverse (12071705), we get a palindrome (62788726).

The spelling of 50717021 in words is "fifty million, seven hundred seventeen thousand, twenty-one".