7221143 has 2 divisors, whose sum is σ = 7221144. Its totient is φ = 7221142.

The previous prime is 7221131. The next prime is 7221157. The reversal of 7221143 is 3411227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7221143 - 2⁶ = 7221079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7221163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610571 + 3610572.

It is an arithmetic number, because the mean of its divisors is an integer number (3610572).

Almost surely, 2^7221143 is an apocalyptic number.

7221143 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221143 is an equidigital number, since it uses as much as digits as its factorization.

7221143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 7221143 is about 2687.2184503683. The cubic root of 7221143 is about 193.2867046354.

The spelling of 7221143 in words is "seven million, two hundred twenty-one thousand, one hundred forty-three".