581479261 has 32 divisors (see below), whose sum is σ = 701809920. Its totient is φ = 476044800.

The previous prime is 581479259. The next prime is 581479289. The reversal of 581479261 is 162974185.

581479261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 581479261 - 2¹ = 581479259 is a prime.

It is a super-2 number, since 2×581479261² = 676236261946212242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581479361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299851 + ... + 301783.

It is an arithmetic number, because the mean of its divisors is an integer number (21931560).

Almost surely, 2^581479261 is an apocalyptic number.

It is an amenable number.

581479261 is a deficient number, since it is larger than the sum of its proper divisors (120330659).

581479261 is a wasteful number, since it uses less digits than its factorization.

581479261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037.

The product of its digits is 120960, while the sum is 43.

The square root of 581479261 is about 24113.8810853832. The cubic root of 581479261 is about 834.6634765687.

The spelling of 581479261 in words is "five hundred eighty-one million, four hundred seventy-nine thousand, two hundred sixty-one".