233231221 has 8 divisors (see below), whose sum is σ = 238528224. Its totient is φ = 227987760.

The previous prime is 233231179. The next prime is 233231263. The reversal of 233231221 is 122132332.

It is an interprime number because it is at equal distance from previous prime (233231179) and next prime (233231263).

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

It is a cyclic number.

It is not a de Polignac number, because 233231221 - 2⁹ = 233230709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233231291) 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, 4510 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (29816028).

Almost surely, 2^233231221 is an apocalyptic number.

It is an amenable number.

233231221 is a deficient number, since it is larger than the sum of its proper divisors (5297003).

233231221 is a wasteful number, since it uses less digits than its factorization.

233231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26771.

The product of its digits is 432, while the sum is 19.

The square root of 233231221 is about 15271.9095400673. The cubic root of 233231221 is about 615.5484309625.

Adding to 233231221 its reverse (122132332), we get a palindrome (355363553).

The spelling of 233231221 in words is "two hundred thirty-three million, two hundred thirty-one thousand, two hundred twenty-one".