68232281 has 4 divisors (see below), whose sum is σ = 73480932. Its totient is φ = 62983632.

The previous prime is 68232257. The next prime is 68232299. The reversal of 68232281 is 18223286.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23609881 + 44622400 = 4859^2 + 6680^2 .

It is a cyclic number.

It is not a de Polignac number, because 68232281 - 2⁶ = 68232217 is a prime.

It is a super-2 number, since 2×68232281² = 9311288340925922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68232251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2624306 + ... + 2624331.

It is an arithmetic number, because the mean of its divisors is an integer number (18370233).

Almost surely, 2^68232281 is an apocalyptic number.

It is an amenable number.

68232281 is a deficient number, since it is larger than the sum of its proper divisors (5248651).

68232281 is a wasteful number, since it uses less digits than its factorization.

68232281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5248650.

The product of its digits is 9216, while the sum is 32.

The square root of 68232281 is about 8260.2833486509. The cubic root of 68232281 is about 408.6297324690.

The spelling of 68232281 in words is "sixty-eight million, two hundred thirty-two thousand, two hundred eighty-one".