221153233 has 8 divisors (see below), whose sum is σ = 252888768. Its totient is φ = 189453264.

The previous prime is 221153227. The next prime is 221153237. The reversal of 221153233 is 332351122.

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

It is not a de Polignac number, because 221153233 - 2²¹ = 219056081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221153237) 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, 6135 + ... + 21907.

It is an arithmetic number, because the mean of its divisors is an integer number (31611096).

Almost surely, 2^221153233 is an apocalyptic number.

It is an amenable number.

221153233 is a deficient number, since it is larger than the sum of its proper divisors (31735535).

221153233 is a wasteful number, since it uses less digits than its factorization.

221153233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17783.

The product of its digits is 1080, while the sum is 22.

The square root of 221153233 is about 14871.2216377808. The cubic root of 221153233 is about 604.7340615678.

The spelling of 221153233 in words is "two hundred twenty-one million, one hundred fifty-three thousand, two hundred thirty-three".