233131213 has 4 divisors (see below), whose sum is σ = 266435680. Its totient is φ = 199826748.

The previous prime is 233131193. The next prime is 233131237. The reversal of 233131213 is 312131332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 233131213 - 2¹³ = 233123021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233137213) 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, 16652223 + ... + 16652236.

It is an arithmetic number, because the mean of its divisors is an integer number (66608920).

Almost surely, 2^233131213 is an apocalyptic number.

It is an amenable number.

233131213 is a deficient number, since it is larger than the sum of its proper divisors (33304467).

233131213 is an equidigital number, since it uses as much as digits as its factorization.

233131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33304466.

The product of its digits is 324, while the sum is 19.

The square root of 233131213 is about 15268.6349422599. The cubic root of 233131213 is about 615.4604373567.

Adding to 233131213 its reverse (312131332), we get a palindrome (545262545).

The spelling of 233131213 in words is "two hundred thirty-three million, one hundred thirty-one thousand, two hundred thirteen".