238331257 has 2 divisors, whose sum is σ = 238331258. Its totient is φ = 238331256.

The previous prime is 238331239. The next prime is 238331293. The reversal of 238331257 is 752133832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220106896 + 18224361 = 14836^2 + 4269^2 .

It is a cyclic number.

It is not a de Polignac number, because 238331257 - 2¹⁹ = 237806969 is a prime.

It is not a weakly prime, because it can be changed into another prime (238331227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119165628 + 119165629.

It is an arithmetic number, because the mean of its divisors is an integer number (119165629).

Almost surely, 2^238331257 is an apocalyptic number.

It is an amenable number.

238331257 is a deficient number, since it is larger than the sum of its proper divisors (1).

238331257 is an equidigital number, since it uses as much as digits as its factorization.

238331257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 238331257 is about 15437.9809884583. The cubic root of 238331257 is about 620.0028243021.

The spelling of 238331257 in words is "two hundred thirty-eight million, three hundred thirty-one thousand, two hundred fifty-seven".