7221090530 has 16 divisors (see below), whose sum is σ = 13092841080. Its totient is φ = 2867352192.

The previous prime is 7221090517. The next prime is 7221090551. The reversal of 7221090530 is 350901227.

It is a Cunningham number, because it is equal to 84977²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 7200031609 + 21058921 = 84853^2 + 4589^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7221090493 and 7221090502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2634065 + ... + 2636804.

Almost surely, 2^7221090530 is an apocalyptic number.

7221090530 is a deficient number, since it is larger than the sum of its proper divisors (5871750550).

7221090530 is a wasteful number, since it uses less digits than its factorization.

7221090530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271013.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 7221090530 is about 84977.0000058839. Note that the first 5 decimals coincide. The cubic root of 7221090530 is about 1932.8623648341.

Adding to 7221090530 its reverse (350901227), we get a palindrome (7571991757).

The spelling of 7221090530 in words is "seven billion, two hundred twenty-one million, ninety thousand, five hundred thirty".