4343431221 has 32 divisors (see below), whose sum is σ = 6616195200. Its totient is φ = 2814134400.

The previous prime is 4343431193. The next prime is 4343431231. The reversal of 4343431221 is 1221343434.

4343431221 is a `hidden beast` number, since 4 + 3 + 4 + 3 + 431 + 221 = 666.

It is not a de Polignac number, because 4343431221 - 2⁹ = 4343430709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4343431231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1125946 + ... + 1129796.

It is an arithmetic number, because the mean of its divisors is an integer number (206756100).

Almost surely, 2^4343431221 is an apocalyptic number.

It is an amenable number.

4343431221 is a deficient number, since it is larger than the sum of its proper divisors (2272763979).

4343431221 is a wasteful number, since it uses less digits than its factorization.

4343431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026 (or 5020 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 4343431221 is about 65904.7131926086. The cubic root of 4343431221 is about 1631.5898048612.

Adding to 4343431221 its reverse (1221343434), we get a palindrome (5564774655).

The spelling of 4343431221 in words is "four billion, three hundred forty-three million, four hundred thirty-one thousand, two hundred twenty-one".