4423402421 has 4 divisors (see below), whose sum is σ = 4455225600. Its totient is φ = 4391579244.

The previous prime is 4423402409. The next prime is 4423402441. The reversal of 4423402421 is 1242043244.

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 4423402421 - 2²² = 4419208117 is a prime.

It is a super-2 number, since 2×4423402421² = 39132977956217322482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4423402441) 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, 15911381 + ... + 15911658.

It is an arithmetic number, because the mean of its divisors is an integer number (1113806400).

Almost surely, 2^4423402421 is an apocalyptic number.

It is an amenable number.

4423402421 is a deficient number, since it is larger than the sum of its proper divisors (31823179).

4423402421 is a wasteful number, since it uses less digits than its factorization.

4423402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31823178.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 4423402421 is about 66508.6642551179. The cubic root of 4423402421 is about 1641.5425726304.

Adding to 4423402421 its reverse (1242043244), we get a palindrome (5665445665).

The spelling of 4423402421 in words is "four billion, four hundred twenty-three million, four hundred two thousand, four hundred twenty-one".