222487081 has 2 divisors, whose sum is σ = 222487082. Its totient is φ = 222487080.

The previous prime is 222487079. The next prime is 222487087. The reversal of 222487081 is 180784222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222487056 + 25 = 14916^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 222487081 - 2¹ = 222487079 is a prime.

It is a super-2 number, since 2×222487081² = 99001002423801122, which contains 22 as substring.

Together with 222487079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (222487087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111243540 + 111243541.

It is an arithmetic number, because the mean of its divisors is an integer number (111243541).

Almost surely, 2^222487081 is an apocalyptic number.

It is an amenable number.

222487081 is a deficient number, since it is larger than the sum of its proper divisors (1).

222487081 is an equidigital number, since it uses as much as digits as its factorization.

222487081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 222487081 is about 14916.0008380263. Note that the first 3 decimals coincide. The cubic root of 222487081 is about 605.9474089068.

The spelling of 222487081 in words is "two hundred twenty-two million, four hundred eighty-seven thousand, eighty-one".