238351681 has 8 divisors (see below), whose sum is σ = 245316960. Its totient is φ = 231484032.

The previous prime is 238351657. The next prime is 238351721. The reversal of 238351681 is 186153832.

238351681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238351681 - 2⁵ = 238351649 is a prime.

It is a super-2 number, since 2×238351681² = 113623047671051522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 238351681.

It is not an unprimeable number, because it can be changed into a prime (238351481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19440 + ... + 29233.

It is an arithmetic number, because the mean of its divisors is an integer number (30664620).

Almost surely, 2^238351681 is an apocalyptic number.

It is an amenable number.

238351681 is a deficient number, since it is larger than the sum of its proper divisors (6965279).

238351681 is an equidigital number, since it uses as much as digits as its factorization.

238351681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48815.

The product of its digits is 34560, while the sum is 37.

The square root of 238351681 is about 15438.6424597501. The cubic root of 238351681 is about 620.0205343528.

The spelling of 238351681 in words is "two hundred thirty-eight million, three hundred fifty-one thousand, six hundred eighty-one".