221233331 has 8 divisors (see below), whose sum is σ = 241460400. Its totient is φ = 201025440.

The previous prime is 221233319. The next prime is 221233339. The reversal of 221233331 is 133332122.

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

It is not a de Polignac number, because 221233331 - 2²² = 217039027 is a prime.

It is a super-2 number, since 2×221233331² = 97888373490711122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221233339) 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, 30965 + ... + 37433.

It is an arithmetic number, because the mean of its divisors is an integer number (30182550).

Almost surely, 2^221233331 is an apocalyptic number.

221233331 is a deficient number, since it is larger than the sum of its proper divisors (20227069).

221233331 is a wasteful number, since it uses less digits than its factorization.

221233331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9589.

The product of its digits is 648, while the sum is 20.

The square root of 221233331 is about 14873.9144477841. The cubic root of 221233331 is about 604.8070609411.

Adding to 221233331 its reverse (133332122), we get a palindrome (354565453).

The spelling of 221233331 in words is "two hundred twenty-one million, two hundred thirty-three thousand, three hundred thirty-one".