7221169 has 2 divisors, whose sum is σ = 7221170. Its totient is φ = 7221168.

The previous prime is 7221163. The next prime is 7221173. The reversal of 7221169 is 9611227.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7091569 + 129600 = 2663^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221169 - 2³ = 7221161 is a prime.

It is a super-2 number, since 2×7221169² = 104290563453122, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7221161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610584 + 3610585.

It is an arithmetic number, because the mean of its divisors is an integer number (3610585).

Almost surely, 2^7221169 is an apocalyptic number.

It is an amenable number.

7221169 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221169 is an equidigital number, since it uses as much as digits as its factorization.

7221169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 7221169 is about 2687.2232880801. The cubic root of 7221169 is about 193.2869366139.

It can be divided in two parts, 722 and 1169, that added together give a triangular number (1891 = T₆₁).

The spelling of 7221169 in words is "seven million, two hundred twenty-one thousand, one hundred sixty-nine".