9222205781 has 8 divisors (see below), whose sum is σ = 9767511360. Its totient is φ = 8677213888.

The previous prime is 9222205777. The next prime is 9222205793. The reversal of 9222205781 is 1875022229.

It is a happy number.

9222205781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9222205781 - 2² = 9222205777 is a prime.

It is a super-2 number, since 2×9222205781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9222205081) 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, 16481 + ... + 136806.

It is an arithmetic number, because the mean of its divisors is an integer number (1220938920).

Almost surely, 2^9222205781 is an apocalyptic number.

It is an amenable number.

9222205781 is a deficient number, since it is larger than the sum of its proper divisors (545305579).

9222205781 is a wasteful number, since it uses less digits than its factorization.

9222205781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156843.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 9222205781 is about 96032.3163367416. The cubic root of 9222205781 is about 2097.0636043141.

The spelling of 9222205781 in words is "nine billion, two hundred twenty-two million, two hundred five thousand, seven hundred eighty-one".