7220843 has 4 divisors (see below), whose sum is σ = 8252400. Its totient is φ = 6189288.

The previous prime is 7220821. The next prime is 7220849. The reversal of 7220843 is 3480227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3480227 = 353 ⋅9859.

It is not a de Polignac number, because 7220843 - 2²⁰ = 6172267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7220849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515768 + ... + 515781.

It is an arithmetic number, because the mean of its divisors is an integer number (2063100).

Almost surely, 2^7220843 is an apocalyptic number.

7220843 is a deficient number, since it is larger than the sum of its proper divisors (1031557).

7220843 is a wasteful number, since it uses less digits than its factorization.

7220843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031556.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 7220843 is about 2687.1626299873. The cubic root of 7220843 is about 193.2840279209.

The spelling of 7220843 in words is "seven million, two hundred twenty thousand, eight hundred forty-three".