213389569 has 8 divisors (see below), whose sum is σ = 221011560. Its totient is φ = 205785216.

The previous prime is 213389563. The next prime is 213389609. The reversal of 213389569 is 965983312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7840000 + 205549569 = 2800^2 + 14337^2 .

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 213389569 - 2⁷ = 213389441 is a prime.

It is a super-2 number, since 2×213389569² = 91070216316011522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213389563) 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, 23247 + ... + 31099.

It is an arithmetic number, because the mean of its divisors is an integer number (27626445).

Almost surely, 2^213389569 is an apocalyptic number.

213389569 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

213389569 is a deficient number, since it is larger than the sum of its proper divisors (7621991).

213389569 is an equidigital number, since it uses as much as digits as its factorization.

213389569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8819.

The product of its digits is 349920, while the sum is 46.

The square root of 213389569 is about 14607.8598364031. The cubic root of 213389569 is about 597.5731313415.

The spelling of 213389569 in words is "two hundred thirteen million, three hundred eighty-nine thousand, five hundred sixty-nine".