50021001 has 6 divisors (see below), whose sum is σ = 72252570. Its totient is φ = 33347328.

The previous prime is 50020981. The next prime is 50021033. The reversal of 50021001 is 10012005.

It is a happy number.

50021001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 26255376 + 23765625 = 5124^2 + 4875^2 .

It is not a de Polignac number, because 50021001 - 2⁹ = 50020489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 5557889 = 50021001 / (5 + 0 + 0 + 2 + 1 + 0 + 0 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50021071) 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 5 ways as a sum of consecutive naturals, for example, 2778936 + ... + 2778953.

It is an arithmetic number, because the mean of its divisors is an integer number (12042095).

Almost surely, 2^50021001 is an apocalyptic number.

It is an amenable number.

50021001 is a deficient number, since it is larger than the sum of its proper divisors (22231569).

50021001 is a wasteful number, since it uses less digits than its factorization.

50021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557895 (or 5557892 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 50021001 is about 7072.5526509175. The cubic root of 50021001 is about 368.4547215413.

Adding to 50021001 its reverse (10012005), we get a palindrome (60033006).

The spelling of 50021001 in words is "fifty million, twenty-one thousand, one".