222557729 has 8 divisors (see below), whose sum is σ = 232457472. Its totient is φ = 212676640.

The previous prime is 222557689. The next prime is 222557747. The reversal of 222557729 is 927755222.

222557729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 222557729 - 2⁸ = 222557473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222557129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23384 + ... + 31494.

It is an arithmetic number, because the mean of its divisors is an integer number (29057184).

Almost surely, 2^222557729 is an apocalyptic number.

It is an amenable number.

222557729 is a deficient number, since it is larger than the sum of its proper divisors (9899743).

222557729 is a wasteful number, since it uses less digits than its factorization.

222557729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9327.

The product of its digits is 176400, while the sum is 41.

The square root of 222557729 is about 14918.3688451519. The cubic root of 222557729 is about 606.0115391355.

The spelling of 222557729 in words is "two hundred twenty-two million, five hundred fifty-seven thousand, seven hundred twenty-nine".