238323831 has 4 divisors (see below), whose sum is σ = 317765112. Its totient is φ = 158882552.

The previous prime is 238323829. The next prime is 238323851. The reversal of 238323831 is 138323832.

238323831 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 is a cyclic number.

It is not a de Polignac number, because 238323831 - 2¹ = 238323829 is a prime.

It is a super-2 number, since 2×238323831² = 113596496845033122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 238323792 and 238323801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238323851) 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, 39720636 + ... + 39720641.

It is an arithmetic number, because the mean of its divisors is an integer number (79441278).

Almost surely, 2^238323831 is an apocalyptic number.

238323831 is a deficient number, since it is larger than the sum of its proper divisors (79441281).

238323831 is an equidigital number, since it uses as much as digits as its factorization.

238323831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79441280.

The product of its digits is 20736, while the sum is 33.

The square root of 238323831 is about 15437.7404758598. The cubic root of 238323831 is about 619.9963848211.

Subtracting from 238323831 its reverse (138323832), we obtain a palindrome (99999999).

The spelling of 238323831 in words is "two hundred thirty-eight million, three hundred twenty-three thousand, eight hundred thirty-one".