223643465 has 4 divisors (see below), whose sum is σ = 268372164. Its totient is φ = 178914768.

The previous prime is 223643423. The next prime is 223643477. The reversal of 223643465 is 564346322.

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 60902416 + 162741049 = 7804^2 + 12757^2 .

It is a cyclic number.

It is not a de Polignac number, because 223643465 - 2⁸ = 223643209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22364342 + ... + 22364351.

It is an arithmetic number, because the mean of its divisors is an integer number (67093041).

Almost surely, 2^223643465 is an apocalyptic number.

It is an amenable number.

223643465 is a deficient number, since it is larger than the sum of its proper divisors (44728699).

223643465 is an equidigital number, since it uses as much as digits as its factorization.

223643465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44728698.

The product of its digits is 103680, while the sum is 35.

The square root of 223643465 is about 14954.7138053525. The cubic root of 223643465 is about 606.9954059328.

Adding to 223643465 its reverse (564346322), we get a palindrome (787989787).

The spelling of 223643465 in words is "two hundred twenty-three million, six hundred forty-three thousand, four hundred sixty-five".