7222215730 has 16 divisors (see below), whose sum is σ = 13010336640. Its totient is φ = 2886586672.

The previous prime is 7222215691. The next prime is 7222215733. The reversal of 7222215730 is 375122227.

It is a junction number, because it is equal to n+sod(n) for n = 7222215692 and 7222215701.

It is not an unprimeable number, because it can be changed into a prime (7222215733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274234 + ... + 299413.

It is an arithmetic number, because the mean of its divisors is an integer number (813146040).

Almost surely, 2^7222215730 is an apocalyptic number.

7222215730 is a deficient number, since it is larger than the sum of its proper divisors (5788120910).

7222215730 is a wasteful number, since it uses less digits than its factorization.

7222215730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574913.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 7222215730 is about 84983.6203629852. The cubic root of 7222215730 is about 1932.9627533544.

Adding to 7222215730 its reverse (375122227), we get a palindrome (7597337957).

The spelling of 7222215730 in words is "seven billion, two hundred twenty-two million, two hundred fifteen thousand, seven hundred thirty".