68721222 has 8 divisors (see below), whose sum is σ = 137442456. Its totient is φ = 22907072.

The previous prime is 68721199. The next prime is 68721239. The reversal of 68721222 is 22212786.

It is a sphenic number, since it is the product of 3 distinct primes.

68721222 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 68721222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5726763 + ... + 5726774.

It is an arithmetic number, because the mean of its divisors is an integer number (17180307).

Almost surely, 2^68721222 is an apocalyptic number.

68721222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

68721222 is a wasteful number, since it uses less digits than its factorization.

68721222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11453542.

The product of its digits is 5376, while the sum is 30.

The square root of 68721222 is about 8289.8264155530. The cubic root of 68721222 is about 409.6034674987.

The spelling of 68721222 in words is "sixty-eight million, seven hundred twenty-one thousand, two hundred twenty-two".