7221716 has 12 divisors (see below), whose sum is σ = 12669300. Its totient is φ = 3601920.

The previous prime is 7221707. The next prime is 7221733. The reversal of 7221716 is 6171227.

It can be written as a sum of positive squares in 2 ways, for example, as 2114116 + 5107600 = 1454^2 + 2260^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215 + ... + 3806.

It is an arithmetic number, because the mean of its divisors is an integer number (1055775).

Almost surely, 2^7221716 is an apocalyptic number.

It is an amenable number.

7221716 is a deficient number, since it is larger than the sum of its proper divisors (5447584).

7221716 is a wasteful number, since it uses less digits than its factorization.

7221716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474 (or 4472 counting only the distinct ones).

The product of its digits is 1176, while the sum is 26.

The square root of 7221716 is about 2687.3250640739. The cubic root of 7221716 is about 193.2918169541.

The spelling of 7221716 in words is "seven million, two hundred twenty-one thousand, seven hundred sixteen".