68574221 has 4 divisors (see below), whose sum is σ = 68724732. Its totient is φ = 68423712.

The previous prime is 68574199. The next prime is 68574223. The reversal of 68574221 is 12247586.

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 61011721 + 7562500 = 7811^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 68574221 - 2¹⁸ = 68312077 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 (68574223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74570 + ... + 75483.

It is an arithmetic number, because the mean of its divisors is an integer number (17181183).

Almost surely, 2^68574221 is an apocalyptic number.

It is an amenable number.

68574221 is a deficient number, since it is larger than the sum of its proper divisors (150511).

68574221 is a wasteful number, since it uses less digits than its factorization.

68574221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150510.

The product of its digits is 26880, while the sum is 35.

The square root of 68574221 is about 8280.9553192853. The cubic root of 68574221 is about 409.3111992020.

The spelling of 68574221 in words is "sixty-eight million, five hundred seventy-four thousand, two hundred twenty-one".