7221947850 has 168 divisors, whose sum is σ = 21690676812. Its totient is φ = 1777593600.

The previous prime is 7221947849. The next prime is 7221947857. The reversal of 7221947850 is 587491227.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2327966001 + 4893981849 = 48249^2 + 69957^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 7221947796 and 7221947805.

It is not an unprimeable number, because it can be changed into a prime (7221947857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 466230 + ... + 481470.

Almost surely, 2^7221947850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7221947850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10845338406).

7221947850 is an abundant number, since it is smaller than the sum of its proper divisors (14468728962).

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

7221947850 is a wasteful number, since it uses less digits than its factorization.

7221947850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15284 (or 15264 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 7221947850 is about 84982.0442799536. The cubic root of 7221947850 is about 1932.9388544807.

The spelling of 7221947850 in words is "seven billion, two hundred twenty-one million, nine hundred forty-seven thousand, eight hundred fifty".