2043453421 has 4 divisors (see below), whose sum is σ = 2069320000. Its totient is φ = 2017586844.

The previous prime is 2043453413. The next prime is 2043453437. The reversal of 2043453421 is 1243543402.

It is a happy number.

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 2043453421 - 2³ = 2043453413 is a prime.

It is a super-5 number, since 5×2043453421⁵ (a number of 48 digits) contains 55555 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2043453421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043453481) 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, 12933171 + ... + 12933328.

It is an arithmetic number, because the mean of its divisors is an integer number (517330000).

Almost surely, 2^2043453421 is an apocalyptic number.

It is an amenable number.

2043453421 is a deficient number, since it is larger than the sum of its proper divisors (25866579).

2043453421 is an equidigital number, since it uses as much as digits as its factorization.

2043453421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25866578.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 2043453421 is about 45204.5730098184. The cubic root of 2043453421 is about 1268.9803999512.

Adding to 2043453421 its reverse (1243543402), we get a palindrome (3286996823).

The spelling of 2043453421 in words is "two billion, forty-three million, four hundred fifty-three thousand, four hundred twenty-one".