581221106 has 8 divisors (see below), whose sum is σ = 872470764. Its totient is φ = 290397520.

The previous prime is 581221099. The next prime is 581221141. The reversal of 581221106 is 601122185.

581221106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 528586081 + 52635025 = 22991^2 + 7255^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103085 + ... + 108576.

Almost surely, 2^581221106 is an apocalyptic number.

581221106 is a deficient number, since it is larger than the sum of its proper divisors (291249658).

581221106 is a wasteful number, since it uses less digits than its factorization.

581221106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213036.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 581221106 is about 24108.5276613899. The cubic root of 581221106 is about 834.5399385171.

The spelling of 581221106 in words is "five hundred eighty-one million, two hundred twenty-one thousand, one hundred six".