868574221 has 8 divisors (see below), whose sum is σ = 881024760. Its totient is φ = 856138752.

The previous prime is 868574191. The next prime is 868574233. The reversal of 868574221 is 122475868.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 340218025 + 528356196 = 18445^2 + 22986^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868574221 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 (868574281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165981 + ... + 171133.

It is an arithmetic number, because the mean of its divisors is an integer number (110128095).

Almost surely, 2^868574221 is an apocalyptic number.

It is an amenable number.

868574221 is a deficient number, since it is larger than the sum of its proper divisors (12450539).

868574221 is a wasteful number, since it uses less digits than its factorization.

868574221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7535.

The product of its digits is 215040, while the sum is 43.

The square root of 868574221 is about 29471.5832794914. The cubic root of 868574221 is about 954.1184892244.

The spelling of 868574221 in words is "eight hundred sixty-eight million, five hundred seventy-four thousand, two hundred twenty-one".