68228281 has 16 divisors (see below), whose sum is σ = 77967360. Its totient is φ = 59099920.

The previous prime is 68228269. The next prime is 68228299. The reversal of 68228281 is 18282286.

It is not a de Polignac number, because 68228281 - 2¹¹ = 68226233 is a prime.

It is a super-2 number, since 2×68228281² = 9310196656429922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68228281.

It is not an unprimeable number, because it can be changed into a prime (68228261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120906 + ... + 121468.

It is an arithmetic number, because the mean of its divisors is an integer number (4872960).

Almost surely, 2^68228281 is an apocalyptic number.

It is an amenable number.

68228281 is a deficient number, since it is larger than the sum of its proper divisors (9739079).

68228281 is a wasteful number, since it uses less digits than its factorization.

68228281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076.

The product of its digits is 24576, while the sum is 37.

The square root of 68228281 is about 8260.0412226574. The cubic root of 68228281 is about 408.6217472415.

The spelling of 68228281 in words is "sixty-eight million, two hundred twenty-eight thousand, two hundred eighty-one".