722222 has 4 divisors (see below), whose sum is σ = 1083336. Its totient is φ = 361110.

The previous prime is 722213. The next prime is 722237. The reversal of 722222 is 222227.

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

722222 is a modest number, since divided by 2222 gives 72 as remainder.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 722222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180554 + ... + 180557.

It is an arithmetic number, because the mean of its divisors is an integer number (270834).

2⁷²²²²² is an apocalyptic number.

722222 is a deficient number, since it is larger than the sum of its proper divisors (361114).

722222 is a wasteful number, since it uses less digits than its factorization.

722222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361113.

The product of its digits is 224, while the sum is 17.

The square root of 722222 is about 849.8364548547. The cubic root of 722222 is about 89.7202009994.

Adding to 722222 its reverse (222227), we get a palindrome (944449).

The spelling of 722222 in words is "seven hundred twenty-two thousand, two hundred twenty-two", and thus it is an iban number.