222447561 has 8 divisors (see below), whose sum is σ = 338967744. Its totient is φ = 127112880.

The previous prime is 222447521. The next prime is 222447581. The reversal of 222447561 is 165744222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 222447561 - 2²⁶ = 155338697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222447521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5296350 + ... + 5296391.

It is an arithmetic number, because the mean of its divisors is an integer number (42370968).

Almost surely, 2^222447561 is an apocalyptic number.

222447561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222447561 is a deficient number, since it is larger than the sum of its proper divisors (116520183).

222447561 is a wasteful number, since it uses less digits than its factorization.

222447561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10592751.

The product of its digits is 26880, while the sum is 33.

The square root of 222447561 is about 14914.6760273229. The cubic root of 222447561 is about 605.9115289814.

The spelling of 222447561 in words is "two hundred twenty-two million, four hundred forty-seven thousand, five hundred sixty-one".