238330330421 has 4 divisors (see below), whose sum is σ = 239143744812. Its totient is φ = 237516916032.

The previous prime is 238330330393. The next prime is 238330330423. The reversal of 238330330421 is 124033033832.

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 107800588900 + 130529741521 = 328330^2 + 361289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238330330421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238330330423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406706756 + ... + 406707341.

It is an arithmetic number, because the mean of its divisors is an integer number (59785936203).

Almost surely, 2^238330330421 is an apocalyptic number.

It is an amenable number.

238330330421 is a deficient number, since it is larger than the sum of its proper divisors (813414391).

238330330421 is an equidigital number, since it uses as much as digits as its factorization.

238330330421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813414390.

The product of its (nonzero) digits is 31104, while the sum is 32.

The spelling of 238330330421 in words is "two hundred thirty-eight billion, three hundred thirty million, three hundred thirty thousand, four hundred twenty-one".