4033402421 has 4 divisors (see below), whose sum is σ = 4034048844. Its totient is φ = 4032756000.

The previous prime is 4033402397. The next prime is 4033402487. The reversal of 4033402421 is 1242043304.

4033402421 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3565761796 + 467640625 = 59714^2 + 21625^2 .

It is a cyclic number.

It is not a de Polignac number, because 4033402421 - 2²⁶ = 3966293557 is a prime.

It is a super-2 number, since 2×4033402421² = 32536670179457322482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4033402721) 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, 313760 + ... + 326361.

It is an arithmetic number, because the mean of its divisors is an integer number (1008512211).

Almost surely, 2^4033402421 is an apocalyptic number.

It is an amenable number.

4033402421 is a deficient number, since it is larger than the sum of its proper divisors (646423).

4033402421 is an equidigital number, since it uses as much as digits as its factorization.

4033402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646422.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 4033402421 is about 63509.0735328425. The cubic root of 4033402421 is about 1591.8073959405.

Adding to 4033402421 its reverse (1242043304), we get a palindrome (5275445725).

The spelling of 4033402421 in words is "four billion, thirty-three million, four hundred two thousand, four hundred twenty-one".