581226012 has 72 divisors (see below), whose sum is σ = 1510629120. Its totient is φ = 188324640.

The previous prime is 581226001. The next prime is 581226043. The reversal of 581226012 is 210622185.

It is a happy number.

581226012 is a `hidden beast` number, since 58 + 1 + 2 + 2 + 601 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 369187 + ... + 370757.

It is an arithmetic number, because the mean of its divisors is an integer number (20980960).

Almost surely, 2^581226012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 581226012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755314560).

581226012 is an abundant number, since it is smaller than the sum of its proper divisors (929403108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

581226012 is a wasteful number, since it uses less digits than its factorization.

581226012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863 (or 1858 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 581226012 is about 24108.6294094044. The cubic root of 581226012 is about 834.5422865859.

Adding to 581226012 its reverse (210622185), we get a palindrome (791848197).

The spelling of 581226012 in words is "five hundred eighty-one million, two hundred twenty-six thousand, twelve".