222666549 has 16 divisors (see below), whose sum is σ = 339576960. Its totient is φ = 127134720.

The previous prime is 222666541. The next prime is 222666551. The reversal of 222666549 is 945666222.

It is not a de Polignac number, because 222666549 - 2³ = 222666541 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222666549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222666541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27709 + ... + 34829.

It is an arithmetic number, because the mean of its divisors is an integer number (21223560).

Almost surely, 2^222666549 is an apocalyptic number.

It is an amenable number.

222666549 is a deficient number, since it is larger than the sum of its proper divisors (116910411).

222666549 is a wasteful number, since it uses less digits than its factorization.

222666549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8620.

The product of its digits is 311040, while the sum is 42.

The square root of 222666549 is about 14922.0155810132. The cubic root of 222666549 is about 606.1102931843.

The spelling of 222666549 in words is "two hundred twenty-two million, six hundred sixty-six thousand, five hundred forty-nine".