40330221 has 4 divisors (see below), whose sum is σ = 53773632. Its totient is φ = 26886812.

The previous prime is 40330207. The next prime is 40330231. The reversal of 40330221 is 12203304.

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 not a de Polignac number, because 40330221 - 2⁵ = 40330189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40330221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40330231) 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, 6721701 + ... + 6721706.

It is an arithmetic number, because the mean of its divisors is an integer number (13443408).

Almost surely, 2^40330221 is an apocalyptic number.

It is an amenable number.

40330221 is a deficient number, since it is larger than the sum of its proper divisors (13443411).

40330221 is a wasteful number, since it uses less digits than its factorization.

40330221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13443410.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 40330221 is about 6350.6079236558. The cubic root of 40330221 is about 342.9337279562.

Adding to 40330221 its reverse (12203304), we get a palindrome (52533525).

The spelling of 40330221 in words is "forty million, three hundred thirty thousand, two hundred twenty-one".