233231321 has 16 divisors (see below), whose sum is σ = 245165568. Its totient is φ = 221616000.

The previous prime is 233231291. The next prime is 233231371. The reversal of 233231321 is 123132332.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233231321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233231293 and 233231302.

It is not an unprimeable number, because it can be changed into a prime (233231371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510125 + ... + 510581.

It is an arithmetic number, because the mean of its divisors is an integer number (15322848).

Almost surely, 2^233231321 is an apocalyptic number.

It is an amenable number.

233231321 is a deficient number, since it is larger than the sum of its proper divisors (11934247).

233231321 is a wasteful number, since it uses less digits than its factorization.

233231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752.

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

The square root of 233231321 is about 15271.9128140518. The cubic root of 233231321 is about 615.5485189365.

Adding to 233231321 its reverse (123132332), we get a palindrome (356363653).

The spelling of 233231321 in words is "two hundred thirty-three million, two hundred thirty-one thousand, three hundred twenty-one".