223420042 has 4 divisors (see below), whose sum is σ = 335130066. Its totient is φ = 111710020.

The previous prime is 223420039. The next prime is 223420049. The reversal of 223420042 is 240024322.

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

It can be written as a sum of positive squares in only one way, i.e., 214593201 + 8826841 = 14649^2 + 2971^2 .

It is not an unprimeable number, because it can be changed into a prime (223420049) 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 as a sum of consecutive naturals, namely, 55855009 + ... + 55855012.

Almost surely, 2^223420042 is an apocalyptic number.

223420042 is a deficient number, since it is larger than the sum of its proper divisors (111710024).

223420042 is a wasteful number, since it uses less digits than its factorization.

223420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111710023.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 223420042 is about 14947.2419529490. The cubic root of 223420042 is about 606.7932062386.

Adding to 223420042 its reverse (240024322), we get a palindrome (463444364).

The spelling of 223420042 in words is "two hundred twenty-three million, four hundred twenty thousand, forty-two".