9390222221 has 16 divisors (see below), whose sum is σ = 10121303808. Its totient is φ = 8679955200.

The previous prime is 9390222217. The next prime is 9390222227. The reversal of 9390222221 is 1222220939.

It is a happy number.

It is not a de Polignac number, because 9390222221 - 2² = 9390222217 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 (9390222227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302651 + ... + 332231.

It is an arithmetic number, because the mean of its divisors is an integer number (632581488).

Almost surely, 2^9390222221 is an apocalyptic number.

It is an amenable number.

9390222221 is a deficient number, since it is larger than the sum of its proper divisors (731081587).

9390222221 is a wasteful number, since it uses less digits than its factorization.

9390222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29932.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 9390222221 is about 96903.1589835956. The cubic root of 9390222221 is about 2109.7222833277.

The spelling of 9390222221 in words is "nine billion, three hundred ninety million, two hundred twenty-two thousand, two hundred twenty-one".