7224181 has 2 divisors, whose sum is σ = 7224182. Its totient is φ = 7224180.

The previous prime is 7224149. The next prime is 7224197. The reversal of 7224181 is 1814227.

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., 6937956 + 286225 = 2634^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 7224181 - 2⁵ = 7224149 is a prime.

It is a super-2 number, since 2×7224181² = 104377582241522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7224101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3612090 + 3612091.

It is an arithmetic number, because the mean of its divisors is an integer number (3612091).

Almost surely, 2^7224181 is an apocalyptic number.

It is an amenable number.

7224181 is a deficient number, since it is larger than the sum of its proper divisors (1).

7224181 is an equidigital number, since it uses as much as digits as its factorization.

7224181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 25.

The square root of 7224181 is about 2687.7836594488. The cubic root of 7224181 is about 193.3138066552.

The spelling of 7224181 in words is "seven million, two hundred twenty-four thousand, one hundred eighty-one".