222440423 has 4 divisors (see below), whose sum is σ = 222586128. Its totient is φ = 222294720.

The previous prime is 222440401. The next prime is 222440431. The reversal of 222440423 is 324044222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324044222 = 2 ⋅162022111.

It is a cyclic number.

It is not a de Polignac number, because 222440423 - 2²⁰ = 221391847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222440453) 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, 70538 + ... + 73623.

It is an arithmetic number, because the mean of its divisors is an integer number (55646532).

Almost surely, 2^222440423 is an apocalyptic number.

222440423 is a deficient number, since it is larger than the sum of its proper divisors (145705).

222440423 is a wasteful number, since it uses less digits than its factorization.

222440423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145704.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 222440423 is about 14914.4367308994. The cubic root of 222440423 is about 605.9050479891.

Adding to 222440423 its reverse (324044222), we get a palindrome (546484645).

The spelling of 222440423 in words is "two hundred twenty-two million, four hundred forty thousand, four hundred twenty-three".