68451222 has 64 divisors (see below), whose sum is σ = 162054144. Its totient is φ = 18869760.

The previous prime is 68451203. The next prime is 68451239. The reversal of 68451222 is 22215486.

It is a self number, because there is not a number n which added to its sum of digits gives 68451222.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 218538 + ... + 218850.

It is an arithmetic number, because the mean of its divisors is an integer number (2532096).

Almost surely, 2^68451222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68451222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81027072).

68451222 is an abundant number, since it is smaller than the sum of its proper divisors (93602922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68451222 is a wasteful number, since it uses less digits than its factorization.

68451222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493.

The product of its digits is 7680, while the sum is 30.

The square root of 68451222 is about 8273.5253670971. The cubic root of 68451222 is about 409.0663307074.

The spelling of 68451222 in words is "sixty-eight million, four hundred fifty-one thousand, two hundred twenty-two".