7221757189 has 16 divisors (see below), whose sum is σ = 7579267200. Its totient is φ = 6867990976.

The previous prime is 7221757061. The next prime is 7221757201. The reversal of 7221757189 is 9817571227.

It is a cyclic number.

It is not a de Polignac number, because 7221757189 - 2⁷ = 7221757061 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 (7221757289) 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, 4224867 + ... + 4226575.

It is an arithmetic number, because the mean of its divisors is an integer number (473704200).

Almost surely, 2^7221757189 is an apocalyptic number.

It is an amenable number.

7221757189 is a deficient number, since it is larger than the sum of its proper divisors (357510011).

7221757189 is a wasteful number, since it uses less digits than its factorization.

7221757189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684.

The product of its digits is 493920, while the sum is 49.

The square root of 7221757189 is about 84980.9225002883. The cubic root of 7221757189 is about 1932.9218443284.

The spelling of 7221757189 in words is "seven billion, two hundred twenty-one million, seven hundred fifty-seven thousand, one hundred eighty-nine".