647222 has 8 divisors (see below), whose sum is σ = 1004400. Its totient is φ = 312424.

The previous prime is 647219. The next prime is 647261. The reversal of 647222 is 222746.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5522 + ... + 5637.

It is an arithmetic number, because the mean of its divisors is an integer number (125550).

2⁶⁴⁷²²² is an apocalyptic number.

647222 is a deficient number, since it is larger than the sum of its proper divisors (357178).

647222 is a wasteful number, since it uses less digits than its factorization.

647222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11190.

The product of its digits is 1344, while the sum is 23.

The square root of 647222 is about 804.5010876313. The cubic root of 647222 is about 86.5003285541.

Adding to 647222 its reverse (222746), we get a palindrome (869968).

The spelling of 647222 in words is "six hundred forty-seven thousand, two hundred twenty-two".