238231313 has 4 divisors (see below), whose sum is σ = 238486500. Its totient is φ = 237976128.

The previous prime is 238231307. The next prime is 238231333. The reversal of 238231313 is 313132832.

238231313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 14190289 + 224041024 = 3767^2 + 14968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238231313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238231333) 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, 126188 + ... + 128061.

It is an arithmetic number, because the mean of its divisors is an integer number (59621625).

Almost surely, 2^238231313 is an apocalyptic number.

It is an amenable number.

238231313 is a deficient number, since it is larger than the sum of its proper divisors (255187).

238231313 is an equidigital number, since it uses as much as digits as its factorization.

238231313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255186.

The product of its digits is 2592, while the sum is 26.

The square root of 238231313 is about 15434.7436972565. The cubic root of 238231313 is about 619.9161463078.

The spelling of 238231313 in words is "two hundred thirty-eight million, two hundred thirty-one thousand, three hundred thirteen".