4240220321 has 4 divisors (see below), whose sum is σ = 4320224532. Its totient is φ = 4160216112.

The previous prime is 4240220293. The next prime is 4240220333. The reversal of 4240220321 is 1230220424.

4240220321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1629010321 + 2611210000 = 40361^2 + 51100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4240220321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4240220293 and 4240220302.

It is not an unprimeable number, because it can be changed into a prime (4240220351) 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, 40002026 + ... + 40002131.

It is an arithmetic number, because the mean of its divisors is an integer number (1080056133).

Almost surely, 2^4240220321 is an apocalyptic number.

It is an amenable number.

4240220321 is a deficient number, since it is larger than the sum of its proper divisors (80004211).

4240220321 is an equidigital number, since it uses as much as digits as its factorization.

4240220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80004210.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4240220321 is about 65116.9741388526. The cubic root of 4240220321 is about 1618.5625007935.

Adding to 4240220321 its reverse (1230220424), we get a palindrome (5470440745).

The spelling of 4240220321 in words is "four billion, two hundred forty million, two hundred twenty thousand, three hundred twenty-one".