42303221 has 4 divisors (see below), whose sum is σ = 42516000. Its totient is φ = 42090444.

The previous prime is 42303181. The next prime is 42303241. The reversal of 42303221 is 12230324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42303221 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 42303221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42303241) 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, 106091 + ... + 106488.

It is an arithmetic number, because the mean of its divisors is an integer number (10629000).

Almost surely, 2^42303221 is an apocalyptic number.

It is an amenable number.

42303221 is a deficient number, since it is larger than the sum of its proper divisors (212779).

42303221 is a wasteful number, since it uses less digits than its factorization.

42303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212778.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 42303221 is about 6504.0926346417. The cubic root of 42303221 is about 348.4371707760.

Adding to 42303221 its reverse (12230324), we get a palindrome (54533545).

It can be divided in two parts, 42303 and 221, that added together give a palindrome (42524).

The spelling of 42303221 in words is "forty-two million, three hundred three thousand, two hundred twenty-one".