7227181 has 8 divisors (see below), whose sum is σ = 7834904. Its totient is φ = 6626880.

The previous prime is 7227167. The next prime is 7227197. The reversal of 7227181 is 1817227.

It can be written as a sum of positive squares in 4 ways, for example, as 17956 + 7209225 = 134^2 + 2685^2 .

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

It is not a de Polignac number, because 7227181 - 2¹¹ = 7225133 is a prime.

It is a super-4 number, since 4×7227181⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

7227181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7227131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271 + ... + 3811.

It is an arithmetic number, because the mean of its divisors is an integer number (979363).

Almost surely, 2^7227181 is an apocalyptic number.

It is an amenable number.

7227181 is a deficient number, since it is larger than the sum of its proper divisors (607723).

7227181 is a wasteful number, since it uses less digits than its factorization.

7227181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711.

The product of its digits is 1568, while the sum is 28.

The square root of 7227181 is about 2688.3416821528. The cubic root of 7227181 is about 193.3405622214.

The spelling of 7227181 in words is "seven million, two hundred twenty-seven thousand, one hundred eighty-one".