233140221 has 8 divisors (see below), whose sum is σ = 345392960. Its totient is φ = 155426796.

The previous prime is 233140199. The next prime is 233140223. The reversal of 233140221 is 122041332.

It is not a de Polignac number, because 233140221 - 2⁵ = 233140189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233140194 and 233140203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233140223) 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, 4317385 + ... + 4317438.

It is an arithmetic number, because the mean of its divisors is an integer number (43174120).

Almost surely, 2^233140221 is an apocalyptic number.

It is an amenable number.

233140221 is a deficient number, since it is larger than the sum of its proper divisors (112252739).

233140221 is an equidigital number, since it uses as much as digits as its factorization.

233140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8634832 (or 8634826 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 233140221 is about 15268.9299232133. The cubic root of 233140221 is about 615.4683642177.

Adding to 233140221 its reverse (122041332), we get a palindrome (355181553).

The spelling of 233140221 in words is "two hundred thirty-three million, one hundred forty thousand, two hundred twenty-one".