7220513 has 8 divisors (see below), whose sum is σ = 7806720. Its totient is φ = 6654960.

The previous prime is 7220497. The next prime is 7220519. The reversal of 7220513 is 3150227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7220513 - 2⁴ = 7220497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7220519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4433 + ... + 5838.

It is an arithmetic number, because the mean of its divisors is an integer number (975840).

Almost surely, 2^7220513 is an apocalyptic number.

It is an amenable number.

7220513 is a deficient number, since it is larger than the sum of its proper divisors (586207).

7220513 is a wasteful number, since it uses less digits than its factorization.

7220513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10327.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 7220513 is about 2687.1012262287. The cubic root of 7220513 is about 193.2810834494.

The spelling of 7220513 in words is "seven million, two hundred twenty thousand, five hundred thirteen".