7220556 has 48 divisors (see below), whose sum is σ = 21396480. Its totient is φ = 2062800.

The previous prime is 7220531. The next prime is 7220557. The reversal of 7220556 is 6550227.

7220556 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4020 + ... + 5531.

It is an arithmetic number, because the mean of its divisors is an integer number (445760).

Almost surely, 2^7220556 is an apocalyptic number.

It is an amenable number.

7220556 is an abundant number, since it is smaller than the sum of its proper divisors (14175924).

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

7220556 is a wasteful number, since it uses less digits than its factorization.

7220556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9571 (or 9563 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 7220556 is about 2687.1092274041. The cubic root of 7220556 is about 193.2814671280.

It can be divided in two parts, 7220 and 556, that added together give a 5-th power (7776 = 6⁵).

The spelling of 7220556 in words is "seven million, two hundred twenty thousand, five hundred fifty-six".