42503221 has 8 divisors (see below), whose sum is σ = 44019360. Its totient is φ = 41011152.

The previous prime is 42503203. The next prime is 42503233. The reversal of 42503221 is 12230524.

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

It is a cyclic number.

It is not a de Polignac number, because 42503221 - 2⁵ = 42503189 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 (42503261) 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, 2386 + ... + 9523.

It is an arithmetic number, because the mean of its divisors is an integer number (5502420).

Almost surely, 2^42503221 is an apocalyptic number.

It is an amenable number.

42503221 is a deficient number, since it is larger than the sum of its proper divisors (1516139).

42503221 is a wasteful number, since it uses less digits than its factorization.

42503221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12035.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42503221 is about 6519.4494399451. The cubic root of 42503221 is about 348.9854182297.

Adding to 42503221 its reverse (12230524), we get a palindrome (54733745).

It can be divided in two parts, 42503 and 221, that added together give a palindrome (42724).

The spelling of 42503221 in words is "forty-two million, five hundred three thousand, two hundred twenty-one".