222487981 has 2 divisors, whose sum is σ = 222487982. Its totient is φ = 222487980.

The previous prime is 222487963. The next prime is 222487999. The reversal of 222487981 is 189784222.

It is a balanced prime because it is at equal distance from previous prime (222487963) and next prime (222487999).

It can be written as a sum of positive squares in only one way, i.e., 140422500 + 82065481 = 11850^2 + 9059^2 .

It is a cyclic number.

It is not a de Polignac number, because 222487981 - 2¹¹ = 222485933 is a prime.

It is a super-2 number, since 2×222487981² = 99001803378912722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222487081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111243990 + 111243991.

It is an arithmetic number, because the mean of its divisors is an integer number (111243991).

Almost surely, 2^222487981 is an apocalyptic number.

It is an amenable number.

222487981 is a deficient number, since it is larger than the sum of its proper divisors (1).

222487981 is an equidigital number, since it uses as much as digits as its factorization.

222487981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 222487981 is about 14916.0310069402. The cubic root of 222487981 is about 605.9482259609.

The spelling of 222487981 in words is "two hundred twenty-two million, four hundred eighty-seven thousand, nine hundred eighty-one".