7211072220 has 48 divisors (see below), whose sum is σ = 22026549888. Its totient is φ = 1748138560.

The previous prime is 7211072213. The next prime is 7211072303. The reversal of 7211072220 is 222701127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5462274 + ... + 5463593.

It is an arithmetic number, because the mean of its divisors is an integer number (458886456).

Almost surely, 2^7211072220 is an apocalyptic number.

It is an amenable number.

7211072220 is an abundant number, since it is smaller than the sum of its proper divisors (14815477668).

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

7211072220 is a wasteful number, since it uses less digits than its factorization.

7211072220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10925890 (or 10925888 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 7211072220 is about 84918.0323606241. The cubic root of 7211072220 is about 1931.9680873381.

Adding to 7211072220 its reverse (222701127), we get a palindrome (7433773347).

It can be divided in two parts, 721107 and 2220, that added together give a palindrome (723327).

The spelling of 7211072220 in words is "seven billion, two hundred eleven million, seventy-two thousand, two hundred twenty".