221133005 has 4 divisors (see below), whose sum is σ = 265359612. Its totient is φ = 176906400.

The previous prime is 221132993. The next prime is 221133061. The reversal of 221133005 is 500331122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52678564 + 168454441 = 7258^2 + 12979^2 .

It is not a de Polignac number, because 221133005 - 2²⁶ = 154024141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22113296 + ... + 22113305.

It is an arithmetic number, because the mean of its divisors is an integer number (66339903).

Almost surely, 2^221133005 is an apocalyptic number.

It is an amenable number.

221133005 is a deficient number, since it is larger than the sum of its proper divisors (44226607).

221133005 is an equidigital number, since it uses as much as digits as its factorization.

221133005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44226606.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 221133005 is about 14870.5415167034. The cubic root of 221133005 is about 604.7156234719.

Adding to 221133005 its reverse (500331122), we get a palindrome (721464127).

The spelling of 221133005 in words is "two hundred twenty-one million, one hundred thirty-three thousand, five".