4050013221 has 6 divisors (see below), whose sum is σ = 5850019110. Its totient is φ = 2700008808.

The previous prime is 4050013217. The next prime is 4050013243. The reversal of 4050013221 is 1223100504.

It can be written as a sum of positive squares in only one way, i.e., 2936122596 + 1113890625 = 54186^2 + 33375^2 .

It is not a de Polignac number, because 4050013221 - 2² = 4050013217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4050013194 and 4050013203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4050013421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225000726 + ... + 225000743.

It is an arithmetic number, because the mean of its divisors is an integer number (975003185).

Almost surely, 2^4050013221 is an apocalyptic number.

It is an amenable number.

4050013221 is a deficient number, since it is larger than the sum of its proper divisors (1800005889).

4050013221 is a wasteful number, since it uses less digits than its factorization.

4050013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450001475 (or 450001472 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 4050013221 is about 63639.7141806907. The cubic root of 4050013221 is about 1593.9895882670.

Adding to 4050013221 its reverse (1223100504), we get a palindrome (5273113725).

The spelling of 4050013221 in words is "four billion, fifty million, thirteen thousand, two hundred twenty-one".