581213 has 8 divisors (see below), whose sum is σ = 622080. Its totient is φ = 541120.

The previous prime is 581201. The next prime is 581227. The reversal of 581213 is 312185.

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

It is a cyclic number.

It is not a de Polignac number, because 581213 - 2⁴ = 581197 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581263) 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, 2948 + ... + 3138.

It is an arithmetic number, because the mean of its divisors is an integer number (77760).

2⁵⁸¹²¹³ is an apocalyptic number.

It is an amenable number.

581213 is a deficient number, since it is larger than the sum of its proper divisors (40867).

581213 is a wasteful number, since it uses less digits than its factorization.

581213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387.

The product of its digits is 240, while the sum is 20.

The square root of 581213 is about 762.3732681567. The cubic root of 581213 is about 83.4536058862.

Adding to 581213 its reverse (312185), we get a palindrome (893398).

It can be divided in two parts, 581 and 213, that multiplied together give a triangular number (123753 = T₄₉₇).

The spelling of 581213 in words is "five hundred eighty-one thousand, two hundred thirteen".