222009923 has 4 divisors (see below), whose sum is σ = 222931368. Its totient is φ = 221088480.

The previous prime is 222009911. The next prime is 222009937. The reversal of 222009923 is 329900222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222009923 - 2²⁰ = 220961347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222009023) 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, 460361 + ... + 460842.

It is an arithmetic number, because the mean of its divisors is an integer number (55732842).

Almost surely, 2^222009923 is an apocalyptic number.

222009923 is a deficient number, since it is larger than the sum of its proper divisors (921445).

222009923 is an equidigital number, since it uses as much as digits as its factorization.

222009923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921444.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 222009923 is about 14899.9974161072. The cubic root of 222009923 is about 605.5139161760.

It can be divided in two parts, 22200 and 9923, that added together give a palindrome (32123).

The spelling of 222009923 in words is "two hundred twenty-two million, nine thousand, nine hundred twenty-three".