30443231221 has 8 divisors (see below), whose sum is σ = 33671100344. Its totient is φ = 27341945280.

The previous prime is 30443231183. The next prime is 30443231239. The reversal of 30443231221 is 12213234403.

It can be written as a sum of positive squares in 4 ways, for example, as 13715688996 + 16727542225 = 117114^2 + 129335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-30443231221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30443231521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31645290 + ... + 31646251.

It is an arithmetic number, because the mean of its divisors is an integer number (4208887543).

Almost surely, 2^30443231221 is an apocalyptic number.

It is an amenable number.

30443231221 is a deficient number, since it is larger than the sum of its proper divisors (3227869123).

30443231221 is a wasteful number, since it uses less digits than its factorization.

30443231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63291591.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 30443231221 its reverse (12213234403), we get a palindrome (42656465624).

The spelling of 30443231221 in words is "thirty billion, four hundred forty-three million, two hundred thirty-one thousand, two hundred twenty-one".