50180021 has 4 divisors (see below), whose sum is σ = 50375532. Its totient is φ = 49984512.

The previous prime is 50179999. The next prime is 50180087. The reversal of 50180021 is 12008105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12008105 = 5 ⋅2401621.

It can be written as a sum of positive squares in 2 ways, for example, as 37039396 + 13140625 = 6086^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 50180021 - 2⁶ = 50179957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50180321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97370 + ... + 97883.

It is an arithmetic number, because the mean of its divisors is an integer number (12593883).

Almost surely, 2^50180021 is an apocalyptic number.

It is an amenable number.

50180021 is a deficient number, since it is larger than the sum of its proper divisors (195511).

50180021 is a wasteful number, since it uses less digits than its factorization.

50180021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195510.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 50180021 is about 7083.7857816284. The cubic root of 50180021 is about 368.8447556548.

Adding to 50180021 its reverse (12008105), we get a palindrome (62188126).

The spelling of 50180021 in words is "fifty million, one hundred eighty thousand, twenty-one".