238557313 has 4 divisors (see below), whose sum is σ = 238600660. Its totient is φ = 238513968.

The previous prime is 238557299. The next prime is 238557323. The reversal of 238557313 is 313755832.

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 104182849 + 134374464 = 10207^2 + 11592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238557313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238557323) 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, 11970 + ... + 24907.

It is an arithmetic number, because the mean of its divisors is an integer number (59650165).

Almost surely, 2^238557313 is an apocalyptic number.

It is an amenable number.

238557313 is a deficient number, since it is larger than the sum of its proper divisors (43347).

238557313 is an equidigital number, since it uses as much as digits as its factorization.

238557313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43346.

The product of its digits is 75600, while the sum is 37.

The square root of 238557313 is about 15445.3006769049. The cubic root of 238557313 is about 620.1987855471.

The spelling of 238557313 in words is "two hundred thirty-eight million, five hundred fifty-seven thousand, three hundred thirteen".