233145313 has 4 divisors (see below), whose sum is σ = 233187588. Its totient is φ = 233103040.

The previous prime is 233145301. The next prime is 233145323. The reversal of 233145313 is 313541332.

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 214681104 + 18464209 = 14652^2 + 4297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233145313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233145323) 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, 11356 + ... + 24397.

It is an arithmetic number, because the mean of its divisors is an integer number (58296897).

Almost surely, 2^233145313 is an apocalyptic number.

It is an amenable number.

233145313 is a deficient number, since it is larger than the sum of its proper divisors (42275).

233145313 is an equidigital number, since it uses as much as digits as its factorization.

233145313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42274.

The product of its digits is 3240, while the sum is 25.

The square root of 233145313 is about 15269.0966661424. The cubic root of 233145313 is about 615.4728449863.

Adding to 233145313 its reverse (313541332), we get a palindrome (546686645).

The spelling of 233145313 in words is "two hundred thirty-three million, one hundred forty-five thousand, three hundred thirteen".