42220423 has 8 divisors (see below), whose sum is σ = 48549248. Its totient is φ = 35965944.

The previous prime is 42220393. The next prime is 42220463. The reversal of 42220423 is 32402224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42220423 - 2²⁵ = 8665991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42220423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42220463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17361 + ... + 19642.

It is an arithmetic number, because the mean of its divisors is an integer number (6068656).

Almost surely, 2^42220423 is an apocalyptic number.

42220423 is a deficient number, since it is larger than the sum of its proper divisors (6328825).

42220423 is a wasteful number, since it uses less digits than its factorization.

42220423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37173.

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

The square root of 42220423 is about 6497.7244478356. The cubic root of 42220423 is about 348.2096960287.

Adding to 42220423 its reverse (32402224), we get a palindrome (74622647).

The spelling of 42220423 in words is "forty-two million, two hundred twenty thousand, four hundred twenty-three".