223520065 has 4 divisors (see below), whose sum is σ = 268224084. Its totient is φ = 178816048.

The previous prime is 223520053. The next prime is 223520117. The reversal of 223520065 is 560025322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 156950784 + 66569281 = 12528^2 + 8159^2 .

It is a cyclic number.

It is not a de Polignac number, because 223520065 - 2⁷ = 223519937 is a prime.

It is a super-2 number, since 2×223520065² = 99922438915208450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22352002 + ... + 22352011.

It is an arithmetic number, because the mean of its divisors is an integer number (67056021).

Almost surely, 2^223520065 is an apocalyptic number.

It is an amenable number.

223520065 is a deficient number, since it is larger than the sum of its proper divisors (44704019).

223520065 is an equidigital number, since it uses as much as digits as its factorization.

223520065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44704018.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 223520065 is about 14950.5874466524. The cubic root of 223520065 is about 606.8837445528.

Adding to 223520065 its reverse (560025322), we get a palindrome (783545387).

The spelling of 223520065 in words is "two hundred twenty-three million, five hundred twenty thousand, sixty-five".