4240304221 has 4 divisors (see below), whose sum is σ = 4240457244. Its totient is φ = 4240151200.

The previous prime is 4240304213. The next prime is 4240304227. The reversal of 4240304221 is 1224030424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3864487225 + 375816996 = 62165^2 + 19386^2 .

It is a cyclic number.

It is not a de Polignac number, because 4240304221 - 2³ = 4240304213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4240304192 and 4240304201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240304227) 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, 22000 + ... + 94681.

It is an arithmetic number, because the mean of its divisors is an integer number (1060114311).

Almost surely, 2^4240304221 is an apocalyptic number.

It is an amenable number.

4240304221 is a deficient number, since it is larger than the sum of its proper divisors (153023).

4240304221 is a wasteful number, since it uses less digits than its factorization.

4240304221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153022.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4240304221 is about 65117.6183609321. The cubic root of 4240304221 is about 1618.5731760641.

Adding to 4240304221 its reverse (1224030424), we get a palindrome (5464334645).

The spelling of 4240304221 in words is "four billion, two hundred forty million, three hundred four thousand, two hundred twenty-one".