50065021 has 4 divisors (see below), whose sum is σ = 50080032. Its totient is φ = 50050012.

The previous prime is 50065009. The next prime is 50065027. The reversal of 50065021 is 12056005.

It is a happy number.

50065021 is a nontrivial binomial coefficient, being equal to C(10007, 2).

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 50065021 - 2⁷ = 50064893 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 50065021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50065027) 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, 1 + ... + 10006.

It is an arithmetic number, because the mean of its divisors is an integer number (12520008).

Almost surely, 2^50065021 is an apocalyptic number.

50065021 is the 10006-th triangular number.

50065021 is the 3336-th centered nonagonal number.

It is an amenable number.

50065021 is a deficient number, since it is larger than the sum of its proper divisors (15011).

50065021 is a wasteful number, since it uses less digits than its factorization.

50065021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15010.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 50065021 is about 7075.6639971101. The cubic root of 50065021 is about 368.5627736328.

The spelling of 50065021 in words is "fifty million, sixty-five thousand, twenty-one".