581387213 has 12 divisors (see below), whose sum is σ = 672682080. Its totient is φ = 500714280.

The previous prime is 581387159. The next prime is 581387231. The reversal of 581387213 is 312783185.

It is a happy number.

581387213 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 581387213 - 2¹⁰ = 581386189 is a prime.

It is a super-2 number, since 2×581387213² = 676022182879814738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581387243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124145 + ... + 128742.

It is an arithmetic number, because the mean of its divisors is an integer number (56056840).

Almost surely, 2^581387213 is an apocalyptic number.

It is an amenable number.

581387213 is a deficient number, since it is larger than the sum of its proper divisors (91294867).

581387213 is a wasteful number, since it uses less digits than its factorization.

581387213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252928 (or 252917 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 581387213 is about 24111.9723996192. The cubic root of 581387213 is about 834.6194319150.

The spelling of 581387213 in words is "five hundred eighty-one million, three hundred eighty-seven thousand, two hundred thirteen".