4040038221 has 4 divisors (see below), whose sum is σ = 5386717632. Its totient is φ = 2693358812.

The previous prime is 4040038217. The next prime is 4040038273. The reversal of 4040038221 is 1228300404.

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 a cyclic number.

It is not a de Polignac number, because 4040038221 - 2² = 4040038217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4040038191 and 4040038200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040038921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673339701 + ... + 673339706.

It is an arithmetic number, because the mean of its divisors is an integer number (1346679408).

Almost surely, 2^4040038221 is an apocalyptic number.

It is an amenable number.

4040038221 is a deficient number, since it is larger than the sum of its proper divisors (1346679411).

4040038221 is a wasteful number, since it uses less digits than its factorization.

4040038221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346679410.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 4040038221 is about 63561.2949915277. The cubic root of 4040038221 is about 1592.6798709184.

Adding to 4040038221 its reverse (1228300404), we get a palindrome (5268338625).

The spelling of 4040038221 in words is "four billion, forty million, thirty-eight thousand, two hundred twenty-one".