238816257 has 4 divisors (see below), whose sum is σ = 318421680. Its totient is φ = 159210836.

The previous prime is 238816229. The next prime is 238816271. The reversal of 238816257 is 752618832.

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 238816257 - 2¹¹ = 238814209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (238816297) 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, 39802707 + ... + 39802712.

It is an arithmetic number, because the mean of its divisors is an integer number (79605420).

Almost surely, 2^238816257 is an apocalyptic number.

It is an amenable number.

238816257 is a deficient number, since it is larger than the sum of its proper divisors (79605423).

238816257 is an equidigital number, since it uses as much as digits as its factorization.

238816257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79605422.

The product of its digits is 161280, while the sum is 42.

The square root of 238816257 is about 15453.6810178028. The cubic root of 238816257 is about 620.4231043636.

The spelling of 238816257 in words is "two hundred thirty-eight million, eight hundred sixteen thousand, two hundred fifty-seven".