7220529 has 16 divisors (see below), whose sum is σ = 11327040. Its totient is φ = 4530240.

The previous prime is 7220519. The next prime is 7220531. The reversal of 7220529 is 9250227.

It is a happy number.

7220529 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7220529 - 2⁵ = 7220497 is a prime.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7220519) 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, 7407 + ... + 8324.

It is an arithmetic number, because the mean of its divisors is an integer number (707940).

Almost surely, 2^7220529 is an apocalyptic number.

It is an amenable number.

7220529 is a deficient number, since it is larger than the sum of its proper divisors (4106511).

7220529 is a wasteful number, since it uses less digits than its factorization.

7220529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15757 (or 15751 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 7220529 is about 2687.1042034130. The cubic root of 7220529 is about 193.2812262137.

The spelling of 7220529 in words is "seven million, two hundred twenty thousand, five hundred twenty-nine".