222011287 has 2 divisors, whose sum is σ = 222011288. Its totient is φ = 222011286.

The previous prime is 222011281. The next prime is 222011291. The reversal of 222011287 is 782110222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222011287 - 2²³ = 213622679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222011281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111005643 + 111005644.

It is an arithmetic number, because the mean of its divisors is an integer number (111005644).

Almost surely, 2^222011287 is an apocalyptic number.

222011287 is a deficient number, since it is larger than the sum of its proper divisors (1).

222011287 is an equidigital number, since it uses as much as digits as its factorization.

222011287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 222011287 is about 14900.0431878569. The cubic root of 222011287 is about 605.5151562396.

The spelling of 222011287 in words is "two hundred twenty-two million, eleven thousand, two hundred eighty-seven".