231133313 has 2 divisors, whose sum is σ = 231133314. Its totient is φ = 231133312.

The previous prime is 231133289. The next prime is 231133319. The reversal of 231133313 is 313331132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183412849 + 47720464 = 13543^2 + 6908^2 .

It is a cyclic number.

It is not a de Polignac number, because 231133313 - 2¹⁴ = 231116929 is a prime.

It is a super-3 number, since 3×231133313³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (231133319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115566656 + 115566657.

It is an arithmetic number, because the mean of its divisors is an integer number (115566657).

Almost surely, 2^231133313 is an apocalyptic number.

It is an amenable number.

231133313 is a deficient number, since it is larger than the sum of its proper divisors (1).

231133313 is an equidigital number, since it uses as much as digits as its factorization.

231133313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 20.

The square root of 231133313 is about 15203.0691967116. The cubic root of 231133313 is about 613.6972560286.

Adding to 231133313 its reverse (313331132), we get a palindrome (544464445).

The spelling of 231133313 in words is "two hundred thirty-one million, one hundred thirty-three thousand, three hundred thirteen".