233581213 has 4 divisors (see below), whose sum is σ = 233648028. Its totient is φ = 233514400.

The previous prime is 233581199. The next prime is 233581247. The reversal of 233581213 is 312185332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53538489 + 180042724 = 7317^2 + 13418^2 .

It is a cyclic number.

It is not a de Polignac number, because 233581213 - 2⁹ = 233580701 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 (233581273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27856 + ... + 35257.

It is an arithmetic number, because the mean of its divisors is an integer number (58412007).

Almost surely, 2^233581213 is an apocalyptic number.

It is an amenable number.

233581213 is a deficient number, since it is larger than the sum of its proper divisors (66815).

233581213 is an equidigital number, since it uses as much as digits as its factorization.

233581213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66814.

The product of its digits is 4320, while the sum is 28.

The square root of 233581213 is about 15283.3639294496. The cubic root of 233581213 is about 615.8561790019.

The spelling of 233581213 in words is "two hundred thirty-three million, five hundred eighty-one thousand, two hundred thirteen".