7222981 has 2 divisors, whose sum is σ = 7222982. Its totient is φ = 7222980.

The previous prime is 7222939. The next prime is 7222991. The reversal of 7222981 is 1892227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6812100 + 410881 = 2610^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 7222981 - 2¹¹ = 7220933 is a prime.

It is a super-2 number, since 2×7222981² = 104342909052722, which contains 22 as substring.

It is equal to p₄₉₀₇₇₄ and since 7222981 and 490774 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7222931) 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 as a sum of consecutive naturals, namely, 3611490 + 3611491.

It is an arithmetic number, because the mean of its divisors is an integer number (3611491).

Almost surely, 2^7222981 is an apocalyptic number.

It is an amenable number.

7222981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7222981 is an equidigital number, since it uses as much as digits as its factorization.

7222981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 7222981 is about 2687.5604179255. The cubic root of 7222981 is about 193.3031023546.

The spelling of 7222981 in words is "seven million, two hundred twenty-two thousand, nine hundred eighty-one".