2404031221 has 16 divisors (see below), whose sum is σ = 2573114560. Its totient is φ = 2239332480.

The previous prime is 2404031209. The next prime is 2404031233. The reversal of 2404031221 is 1221304042.

It is an interprime number because it is at equal distance from previous prime (2404031209) and next prime (2404031233).

It is a cyclic number.

It is not a de Polignac number, because 2404031221 - 2¹³ = 2404023029 is a prime.

It is a super-2 number, since 2×2404031221² = 11558732223085501682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2404031261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840025 + ... + 842881.

It is an arithmetic number, because the mean of its divisors is an integer number (160819660).

Almost surely, 2^2404031221 is an apocalyptic number.

It is an amenable number.

2404031221 is a deficient number, since it is larger than the sum of its proper divisors (169083339).

2404031221 is a wasteful number, since it uses less digits than its factorization.

2404031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2404031221 is about 49030.9210702797. The cubic root of 2404031221 is about 1339.6151008957.

Adding to 2404031221 its reverse (1221304042), we get a palindrome (3625335263).

The spelling of 2404031221 in words is "two billion, four hundred four million, thirty-one thousand, two hundred twenty-one".