168725251 has 2 divisors, whose sum is σ = 168725252. Its totient is φ = 168725250.

The previous prime is 168725243. The next prime is 168725257. The reversal of 168725251 is 152527861.

It is a strong prime.

It is an emirp because it is prime and its reverse (152527861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168725251 - 2³ = 168725243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168725251.

It is not a weakly prime, because it can be changed into another prime (168725257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84362625 + 84362626.

It is an arithmetic number, because the mean of its divisors is an integer number (84362626).

Almost surely, 2^168725251 is an apocalyptic number.

168725251 is a deficient number, since it is larger than the sum of its proper divisors (1).

168725251 is an equidigital number, since it uses as much as digits as its factorization.

168725251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 37.

The square root of 168725251 is about 12989.4284323830. The cubic root of 168725251 is about 552.5777083358.

The spelling of 168725251 in words is "one hundred sixty-eight million, seven hundred twenty-five thousand, two hundred fifty-one".