222724 has 6 divisors (see below), whose sum is σ = 389774. Its totient is φ = 111360.

The previous prime is 222713. The next prime is 222731. The reversal of 222724 is 427222.

222724 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 186624 + 36100 = 432^2 + 190^2 .

It is a congruent number.

It is an unprimeable number.

222724 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27837 + ... + 27844.

2²²²⁷²⁴ is an apocalyptic number.

It is an amenable number.

222724 is a deficient number, since it is larger than the sum of its proper divisors (167050).

222724 is a wasteful number, since it uses less digits than its factorization.

222724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55685 (or 55683 counting only the distinct ones).

The product of its digits is 448, while the sum is 19.

The square root of 222724 is about 471.9364363980. The cubic root of 222724 is about 60.6162416936.

Adding to 222724 its reverse (427222), we get a palindrome (649946).

It can be divided in two parts, 222 and 724, that added together give a triangular number (946 = T₄₃).

The spelling of 222724 in words is "two hundred twenty-two thousand, seven hundred twenty-four", and thus it is an iban number.