68221333 has 4 divisors (see below), whose sum is σ = 68284620. Its totient is φ = 68158048.

The previous prime is 68221301. The next prime is 68221397. The reversal of 68221333 is 33312286.

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 13490929 + 54730404 = 3673^2 + 7398^2 .

It is a cyclic number.

It is not a de Polignac number, because 68221333 - 2⁵ = 68221301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68221033) 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, 29998 + ... + 32191.

It is an arithmetic number, because the mean of its divisors is an integer number (17071155).

Almost surely, 2^68221333 is an apocalyptic number.

It is an amenable number.

68221333 is a deficient number, since it is larger than the sum of its proper divisors (63287).

68221333 is a wasteful number, since it uses less digits than its factorization.

68221333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63286.

The product of its digits is 5184, while the sum is 28.

The square root of 68221333 is about 8259.6206329347. The cubic root of 68221333 is about 408.6078761593.

The spelling of 68221333 in words is "sixty-eight million, two hundred twenty-one thousand, three hundred thirty-three".