423220342 has 4 divisors (see below), whose sum is σ = 634830516. Its totient is φ = 211610170.

The previous prime is 423220337. The next prime is 423220351. The reversal of 423220342 is 243022324.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105805084 + ... + 105805087.

It is an arithmetic number, because the mean of its divisors is an integer number (158707629).

Almost surely, 2^423220342 is an apocalyptic number.

423220342 is a deficient number, since it is larger than the sum of its proper divisors (211610174).

423220342 is a wasteful number, since it uses less digits than its factorization.

423220342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211610173.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 423220342 is about 20572.3198011308. The cubic root of 423220342 is about 750.7963937470.

Adding to 423220342 its reverse (243022324), we get a palindrome (666242666).

The spelling of 423220342 in words is "four hundred twenty-three million, two hundred twenty thousand, three hundred forty-two".