2004343521 has 4 divisors (see below), whose sum is σ = 2672458032. Its totient is φ = 1336229012.

The previous prime is 2004343513. The next prime is 2004343543. The reversal of 2004343521 is 1253434002.

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 2004343521 - 2³ = 2004343513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2004343491 and 2004343500.

It is not an unprimeable number, because it can be changed into a prime (2004343921) 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, 334057251 + ... + 334057256.

It is an arithmetic number, because the mean of its divisors is an integer number (668114508).

Almost surely, 2^2004343521 is an apocalyptic number.

It is an amenable number.

2004343521 is a deficient number, since it is larger than the sum of its proper divisors (668114511).

2004343521 is an equidigital number, since it uses as much as digits as its factorization.

2004343521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668114510.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2004343521 is about 44769.8952533954. The cubic root of 2004343521 is about 1260.8324726721.

Adding to 2004343521 its reverse (1253434002), we get a palindrome (3257777523).

The spelling of 2004343521 in words is "two billion, four million, three hundred forty-three thousand, five hundred twenty-one".