221040433 has 8 divisors (see below), whose sum is σ = 233046720. Its totient is φ = 209071440.

The previous prime is 221040427. The next prime is 221040439. The reversal of 221040433 is 334040122.

It is an interprime number because it is at equal distance from previous prime (221040427) and next prime (221040439).

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

It is not a de Polignac number, because 221040433 - 2⁵ = 221040401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 221040433.

It is not an unprimeable number, because it can be changed into a prime (221040439) 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, 3303 + ... + 21283.

It is an arithmetic number, because the mean of its divisors is an integer number (29130840).

Almost surely, 2^221040433 is an apocalyptic number.

It is an amenable number.

221040433 is a deficient number, since it is larger than the sum of its proper divisors (12006287).

221040433 is a wasteful number, since it uses less digits than its factorization.

221040433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18647.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 221040433 is about 14867.4285940777. The cubic root of 221040433 is about 604.6312284898.

Adding to 221040433 its reverse (334040122), we get a palindrome (555080555).

The spelling of 221040433 in words is "two hundred twenty-one million, forty thousand, four hundred thirty-three".