8073231221 has 4 divisors (see below), whose sum is σ = 8807161344. Its totient is φ = 7339301100.

The previous prime is 8073231217. The next prime is 8073231227. The reversal of 8073231221 is 1221323708.

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 8073231221 - 2² = 8073231217 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 (8073231227) 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, 366965045 + ... + 366965066.

It is an arithmetic number, because the mean of its divisors is an integer number (2201790336).

Almost surely, 2^8073231221 is an apocalyptic number.

It is an amenable number.

8073231221 is a deficient number, since it is larger than the sum of its proper divisors (733930123).

8073231221 is a wasteful number, since it uses less digits than its factorization.

8073231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733930122.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 8073231221 is about 89851.1614894321. The cubic root of 8073231221 is about 2006.0840749984.

Adding to 8073231221 its reverse (1221323708), we get a palindrome (9294554929).

The spelling of 8073231221 in words is "eight billion, seventy-three million, two hundred thirty-one thousand, two hundred twenty-one".