7293722221 has 16 divisors (see below), whose sum is σ = 7510060800. Its totient is φ = 7079663808.

The previous prime is 7293722209. The next prime is 7293722263. The reversal of 7293722221 is 1222273927.

7293722221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7293722221 - 2¹⁵ = 7293689453 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 (7293722201) 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, 8316235 + ... + 8317111.

It is an arithmetic number, because the mean of its divisors is an integer number (469378800).

Almost surely, 2^7293722221 is an apocalyptic number.

It is an amenable number.

7293722221 is a deficient number, since it is larger than the sum of its proper divisors (216338579).

7293722221 is a wasteful number, since it uses less digits than its factorization.

7293722221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908.

The product of its digits is 42336, while the sum is 37.

The square root of 7293722221 is about 85403.2916286018. The cubic root of 7293722221 is about 1939.3211764843.

The spelling of 7293722221 in words is "seven billion, two hundred ninety-three million, seven hundred twenty-two thousand, two hundred twenty-one".