222549871 has 2 divisors, whose sum is σ = 222549872. Its totient is φ = 222549870.

The previous prime is 222549851. The next prime is 222549881. The reversal of 222549871 is 178945222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222549871 - 2¹⁵ = 222517103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222549851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111274935 + 111274936.

It is an arithmetic number, because the mean of its divisors is an integer number (111274936).

Almost surely, 2^222549871 is an apocalyptic number.

222549871 is a deficient number, since it is larger than the sum of its proper divisors (1).

222549871 is an equidigital number, since it uses as much as digits as its factorization.

222549871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 222549871 is about 14918.1054762326. The cubic root of 222549871 is about 606.0044067618.

The spelling of 222549871 in words is "two hundred twenty-two million, five hundred forty-nine thousand, eight hundred seventy-one".