2229320721 has 8 divisors (see below), whose sum is σ = 3147276384. Its totient is φ = 1398789440.

The previous prime is 2229320719. The next prime is 2229320771. The reversal of 2229320721 is 1270239222.

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 2229320721 - 2¹ = 2229320719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2229320771) 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, 21856035 + ... + 21856136.

It is an arithmetic number, because the mean of its divisors is an integer number (393409548).

Almost surely, 2^2229320721 is an apocalyptic number.

It is an amenable number.

2229320721 is a deficient number, since it is larger than the sum of its proper divisors (917955663).

2229320721 is a wasteful number, since it uses less digits than its factorization.

2229320721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43712191.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 2229320721 is about 47215.6829983428. The cubic root of 2229320721 is about 1306.3438876801.

Adding to 2229320721 its reverse (1270239222), we get a palindrome (3499559943).

The spelling of 2229320721 in words is "two billion, two hundred twenty-nine million, three hundred twenty thousand, seven hundred twenty-one".