222542009 has 4 divisors (see below), whose sum is σ = 222591120. Its totient is φ = 222492900.

The previous prime is 222541987. The next prime is 222542059. The reversal of 222542009 is 900245222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222542009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222542059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16979 + ... + 27080.

It is an arithmetic number, because the mean of its divisors is an integer number (55647780).

Almost surely, 2^222542009 is an apocalyptic number.

It is an amenable number.

222542009 is a deficient number, since it is larger than the sum of its proper divisors (49111).

222542009 is an equidigital number, since it uses as much as digits as its factorization.

222542009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49110.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 222542009 is about 14917.8419685959. The cubic root of 222542009 is about 605.9972705894.

The spelling of 222542009 in words is "two hundred twenty-two million, five hundred forty-two thousand, nine".