68240251 has 2 divisors, whose sum is σ = 68240252. Its totient is φ = 68240250.

The previous prime is 68240233. The next prime is 68240297. The reversal of 68240251 is 15204286.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68240251 - 2¹⁷ = 68109179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68243251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34120125 + 34120126.

It is an arithmetic number, because the mean of its divisors is an integer number (34120126).

Almost surely, 2^68240251 is an apocalyptic number.

68240251 is a deficient number, since it is larger than the sum of its proper divisors (1).

68240251 is an equidigital number, since it uses as much as digits as its factorization.

68240251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 68240251 is about 8260.7657635355. The cubic root of 68240251 is about 408.6456421046.

The spelling of 68240251 in words is "sixty-eight million, two hundred forty thousand, two hundred fifty-one".