4043452021 has 24 divisors (see below), whose sum is σ = 4825154880. Its totient is φ = 3376497600.

The previous prime is 4043452009. The next prime is 4043452027. The reversal of 4043452021 is 1202543404.

It is a happy number.

It is not a de Polignac number, because 4043452021 - 2⁹ = 4043451509 is a prime.

It is a super-2 number, since 2×4043452021² = 32699008492257968882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4043452027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2592840 + ... + 2594398.

It is an arithmetic number, because the mean of its divisors is an integer number (201048120).

Almost surely, 2^4043452021 is an apocalyptic number.

4043452021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4043452021 is a deficient number, since it is larger than the sum of its proper divisors (781702859).

4043452021 is a wasteful number, since it uses less digits than its factorization.

4043452021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905 (or 2898 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 4043452021 is about 63588.1437140604. The cubic root of 4043452021 is about 1593.1283452093.

Adding to 4043452021 its reverse (1202543404), we get a palindrome (5245995425).

The spelling of 4043452021 in words is "four billion, forty-three million, four hundred fifty-two thousand, twenty-one".