268388251 has 2 divisors, whose sum is σ = 268388252. Its totient is φ = 268388250.

The previous prime is 268388149. The next prime is 268388257. The reversal of 268388251 is 152883862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268388251 - 2⁷ = 268388123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 268388198 and 268388207.

It is not a weakly prime, because it can be changed into another prime (268388257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134194125 + 134194126.

It is an arithmetic number, because the mean of its divisors is an integer number (134194126).

Almost surely, 2^268388251 is an apocalyptic number.

268388251 is a deficient number, since it is larger than the sum of its proper divisors (1).

268388251 is an equidigital number, since it uses as much as digits as its factorization.

268388251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 43.

The square root of 268388251 is about 16382.5593543866. The cubic root of 268388251 is about 645.0417624142.

The spelling of 268388251 in words is "two hundred sixty-eight million, three hundred eighty-eight thousand, two hundred fifty-one".