7223981 has 2 divisors, whose sum is σ = 7223982. Its totient is φ = 7223980.

The previous prime is 7223959. The next prime is 7223999. The reversal of 7223981 is 1893227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3648100 + 3575881 = 1910^2 + 1891^2 .

It is a cyclic number.

It is not a de Polignac number, because 7223981 - 2¹⁴ = 7207597 is a prime.

It is a super-2 number, since 2×7223981² = 104371802976722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7223911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3611990 + 3611991.

It is an arithmetic number, because the mean of its divisors is an integer number (3611991).

Almost surely, 2^7223981 is an apocalyptic number.

It is an amenable number.

7223981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7223981 is an equidigital number, since it uses as much as digits as its factorization.

7223981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 7223981 is about 2687.7464538159. The cubic root of 7223981 is about 193.3120226874.

The spelling of 7223981 in words is "seven million, two hundred twenty-three thousand, nine hundred eighty-one".