7222566 has 64 divisors (see below), whose sum is σ = 16773120. Its totient is φ = 2056320.

The previous prime is 7222561. The next prime is 7222571. The reversal of 7222566 is 6652227.

It is an interprime number because it is at equal distance from previous prime (7222561) and next prime (7222571).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7222561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70071 + ... + 70173.

It is an arithmetic number, because the mean of its divisors is an integer number (262080).

Almost surely, 2^7222566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7222566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8386560).

7222566 is an abundant number, since it is smaller than the sum of its proper divisors (9550554).

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

7222566 is a wasteful number, since it uses less digits than its factorization.

7222566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its digits is 10080, while the sum is 30.

The square root of 7222566 is about 2687.4832092499. The cubic root of 7222566 is about 193.2994001748.

The spelling of 7222566 in words is "seven million, two hundred twenty-two thousand, five hundred sixty-six".