7220000000 has 216 divisors, whose sum is σ = 19012744296. Its totient is φ = 2736000000.

The previous prime is 7219999991. The next prime is 7220000003. The reversal of 7220000000 is 227.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 4 ways, for example, as 7142278144 + 77721856 = 84512^2 + 8816^2 .

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220000003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 379999991 + ... + 380000009.

Almost surely, 2^7220000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7220000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9506372148).

7220000000 is an abundant number, since it is smaller than the sum of its proper divisors (11792744296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7220000000 is an frugal number, since it uses more digits than its factorization.

7220000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 11.

The square root of 7220000000 is about 84970.5831449920. The cubic root of 7220000000 is about 1932.7650595631.

Adding to 7220000000 its reverse (227), we get a palindrome (7220000227).

The spelling of 7220000000 in words is "seven billion, two hundred twenty million", and thus it is an aban number.