7222816 has 24 divisors (see below), whose sum is σ = 14336784. Its totient is φ = 3581760.

The previous prime is 7222811. The next prime is 7222823. The reversal of 7222816 is 6182227.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7222811) 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, 3331 + ... + 5053.

It is an arithmetic number, because the mean of its divisors is an integer number (597366).

Almost surely, 2^7222816 is an apocalyptic number.

It is an amenable number.

7222816 is a deficient number, since it is larger than the sum of its proper divisors (7113968).

7222816 is a wasteful number, since it uses less digits than its factorization.

7222816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864 (or 1856 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 7222816 is about 2687.5297207659. The cubic root of 7222816 is about 193.3016304206.

The spelling of 7222816 in words is "seven million, two hundred twenty-two thousand, eight hundred sixteen".