7221171 has 8 divisors (see below), whose sum is σ = 9938944. Its totient is φ = 4658760.

The previous prime is 7221169. The next prime is 7221173. The reversal of 7221171 is 1711227.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7221169) and next prime (7221173).

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

It is not a de Polignac number, because 7221171 - 2¹ = 7221169 is a prime.

It is a super-2 number, since 2×7221171² = 104290621222482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7221173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38731 + ... + 38916.

It is an arithmetic number, because the mean of its divisors is an integer number (1242368).

Almost surely, 2^7221171 is an apocalyptic number.

7221171 is a deficient number, since it is larger than the sum of its proper divisors (2717773).

7221171 is a wasteful number, since it uses less digits than its factorization.

7221171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77681.

The product of its digits is 196, while the sum is 21.

The square root of 7221171 is about 2687.2236602114. The cubic root of 7221171 is about 193.2869544583.

Adding to 7221171 its reverse (1711227), we get a palindrome (8932398).

The spelling of 7221171 in words is "seven million, two hundred twenty-one thousand, one hundred seventy-one".