581222 has 4 divisors (see below), whose sum is σ = 871836. Its totient is φ = 290610.

The previous prime is 581201. The next prime is 581227. The reversal of 581222 is 222185.

It is a semiprime because it is the product of two primes.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 581194 and 581203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581227) by changing a digit.

581222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145304 + ... + 145307.

It is an arithmetic number, because the mean of its divisors is an integer number (217959).

2⁵⁸¹²²² is an apocalyptic number.

581222 is a deficient number, since it is larger than the sum of its proper divisors (290614).

581222 is a wasteful number, since it uses less digits than its factorization.

581222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290613.

The product of its digits is 320, while the sum is 20.

The square root of 581222 is about 762.3791707543. The cubic root of 581222 is about 83.4540366397.

It can be divided in two parts, 58 and 1222, that multiplied together give a triangular number (70876 = T₃₇₆).

The spelling of 581222 in words is "five hundred eighty-one thousand, two hundred twenty-two".