222815329 has 27 divisors (see below), whose sum is σ = 260437009. Its totient is φ = 190468520.

The previous prime is 222815317. The next prime is 222815353. The reversal of 222815329 is 923518222.

The square root of 222815329 is 14927.

It is a perfect power (a square), and thus also a powerful number.

222815329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 222815329 - 2⁹ = 222814817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222815294 and 222815303.

It is not an unprimeable number, because it can be changed into a prime (222815399) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3776502 + ... + 3776560.

Almost surely, 2^222815329 is an apocalyptic number.

222815329 is the 14927-th square number.

222815329 is the 7464-th centered octagonal number.

It is an amenable number.

222815329 is a deficient number, since it is larger than the sum of its proper divisors (37621680).

222815329 is an equidigital number, since it uses as much as digits as its factorization.

222815329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 93 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The cubic root of 222815329 is about 606.2452588427.

The spelling of 222815329 in words is "two hundred twenty-two million, eight hundred fifteen thousand, three hundred twenty-nine".