7221428650 has 24 divisors (see below), whose sum is σ = 13437113184. Its totient is φ = 2887441200.

The previous prime is 7221428597. The next prime is 7221428659. The reversal of 7221428650 is 568241227.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7221428659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107235 + ... + 161065.

It is an arithmetic number, because the mean of its divisors is an integer number (559879716).

Almost surely, 2^7221428650 is an apocalyptic number.

7221428650 is a deficient number, since it is larger than the sum of its proper divisors (6215684534).

7221428650 is a wasteful number, since it uses less digits than its factorization.

7221428650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56526 (or 56521 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 7221428650 is about 84978.9894621017. The cubic root of 7221428650 is about 1932.8925324484.

Adding to 7221428650 its reverse (568241227), we get a palindrome (7789669877).

The spelling of 7221428650 in words is "seven billion, two hundred twenty-one million, four hundred twenty-eight thousand, six hundred fifty".