68205151 has 4 divisors (see below), whose sum is σ = 77948752. Its totient is φ = 58461552.

The previous prime is 68205127. The next prime is 68205191. The reversal of 68205151 is 15150286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68205151 - 2⁵ = 68205119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68205191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4871790 + ... + 4871803.

It is an arithmetic number, because the mean of its divisors is an integer number (19487188).

Almost surely, 2^68205151 is an apocalyptic number.

68205151 is a deficient number, since it is larger than the sum of its proper divisors (9743601).

68205151 is an equidigital number, since it uses as much as digits as its factorization.

68205151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9743600.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 68205151 is about 8258.6409898966. The cubic root of 68205151 is about 408.5755665419.

The spelling of 68205151 in words is "sixty-eight million, two hundred five thousand, one hundred fifty-one".