613221 has 8 divisors (see below), whose sum is σ = 934464. Its totient is φ = 350400.

The previous prime is 613219. The next prime is 613229. The reversal of 613221 is 122316.

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

It is not a de Polignac number, because 613221 - 2¹ = 613219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 613221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613229) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 14580 + ... + 14621.

It is an arithmetic number, because the mean of its divisors is an integer number (116808).

2⁶¹³²²¹ is an apocalyptic number.

It is an amenable number.

613221 is a deficient number, since it is larger than the sum of its proper divisors (321243).

613221 is a wasteful number, since it uses less digits than its factorization.

613221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29211.

The product of its digits is 72, while the sum is 15.

The square root of 613221 is about 783.0842866512. The cubic root of 613221 is about 84.9582724831.

Adding to 613221 its reverse (122316), we get a palindrome (735537).

The spelling of 613221 in words is "six hundred thirteen thousand, two hundred twenty-one".